Articles de revues : « PCoC - Power Chip on Chip »

1

Tan, N., et S. Eriksson. « Low-power chip-to-chip communication circuits ». Electronics Letters 30, n^o 21 (13 octobre 1994) : 1732–33. http://dx.doi.org/10.1049/el:19941178.

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Yerman, AlexanderJ. « 4538170 Power chip package ». Microelectronics Reliability 26, n^o 3 (janvier 1986) : 594. http://dx.doi.org/10.1016/0026-2714(86)90686-4.

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FOK, C. W., et D. L. PULFREY. « FULL-CHIP POWER-SUPPLY NOISE : THE EFFECT OF ON-CHIP POWER-RAIL INDUCTANCE ». International Journal of High Speed Electronics and Systems 12, n^o 02 (juin 2002) : 573–82. http://dx.doi.org/10.1142/s0129156402001472.

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The importance of on-chip power-rail inductance in generating delta-I power-supply noise is examined in this paper using systematic circuit simulation of the complete integrated-circuit power net. This source of noise is compared to the resistive IR drop in the net, and to the delta-I noise due to both high-inductance- and low-inductance-bonding packages. Results are presented for a typical on-chip power net in 0.18 μm CMOS technology, and it is demonstrated that the inductance of this on-chip power net is the dominant contributor to the full-chip power-supply noise. The simultaneous switching events which produce the triggering current transients for the delta-I noise are taken to arise from core-logic switching; the mitigating, de-coupling role of the capacitance of non-switching gates within the core-logic block is considered.

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Laha, Soumyasanta, Savas Kaya, David W. Matolak, William Rayess, Dominic DiTomaso et Avinash Kodi. « A New Frontier in Ultralow Power Wireless Links : Network-on-Chip and Chip-to-Chip Interconnects ». IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems 34, n^o 2 (février 2015) : 186–98. http://dx.doi.org/10.1109/tcad.2014.2379640.

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Eireiner, M., S. Henzler, X. Zhang, J. Berthold et D. Schmitt-Landsiedel. « Impact of on-chip inductance on power supply integrity ». Advances in Radio Science 6 (26 mai 2008) : 227–32. http://dx.doi.org/10.5194/ars-6-227-2008.

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Abstract. Based on product related scenarios, the impact of on-chip inductance on power supply integrity is analyzed. The impact of varying current profiles is shown to be minimal. In a regular power grid with regular bump connections, the impact of on-chip inductance on the cycle average of the supply voltage can be neglected, even for a worst case estimation of on-chip inductance. Whereas, the maximum transient power supply drop can be significantly underestimated by neglecting on-chip inductance. The impact of on-chip inductance in a System-on-Chip (SoC) environment also can be neglected if the on-chip inductance is conservativly estimated.

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Pathak, Divya, Houman Homayoun et Ioannis Savidis. « Smart Grid on Chip : Work Load-Balanced On-Chip Power Delivery ». IEEE Transactions on Very Large Scale Integration (VLSI) Systems 25, n^o 9 (septembre 2017) : 2538–51. http://dx.doi.org/10.1109/tvlsi.2017.2699644.

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Kose, Selçuk, et Eby G. Friedman. « Distributed On-Chip Power Delivery ». IEEE Journal on Emerging and Selected Topics in Circuits and Systems 2, n^o 4 (décembre 2012) : 704–13. http://dx.doi.org/10.1109/jetcas.2012.2226378.

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Costlow, T. « Vision chip slashes power consumption ». IEEE Intelligent Systems 18, n^o 6 (novembre 2003) : 6–7. http://dx.doi.org/10.1109/mis.2003.1249162.

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Perotto, J.-F., C. Piguet et C. Voirol. « One-chip low-power multiprocessor ». Microprocessing and Microprogramming 28, n^o 1-5 (mars 1990) : 129–32. http://dx.doi.org/10.1016/0165-6074(90)90161-2.

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Li, Jun Hui, Lei Han, Ji An Duan et Jue Zhong. « Features of Machine Variables in Thermosonic Flip Chip ». Key Engineering Materials 339 (mai 2007) : 257–62. http://dx.doi.org/10.4028/www.scientific.net/kem.339.257.

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An assembly bed on thermosonic flip chip bonding was set up, two different structures of tool tips were designed, and a series of experiments on flip chip and bonding machine variables were carried out. Lift-off characteristics of thermosonic flip chip were investigated by using Scanning Electron Microscope (JSM-6360LV), and vibration features of tool tips driven by high frequency were tested by using PSV-400-M2 Laser Doppler Vibrometer. Results show that, for chip-press model, slippage and rotation phenomena between tool tip and chip have been solved by using tool with greater area tip pattern during flip-chip bonding process, and welding failures appeared in chip-collet model have been controlled. Greater area pattern on tool tip is better than small area pattern. The power of ‘n’ bumps on flip chip bonding is far smaller than that of n×(the power of single wire bonding). The power is directly proportion to vibration displacement driven by the power, high-power decrease positioning precision of flip chip bonding or result in slippage and rotation phenomena. The proper machine variables ranges for thermosonic flip chip had been obtained.

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Yin, Feng Ling, Bing Quan Huo, Hai Bo Wang et Long Cheng. « A Design for Power Supply Monitoring ». Advanced Materials Research 912-914 (avril 2014) : 1061–64. http://dx.doi.org/10.4028/www.scientific.net/amr.912-914.1061.

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Monitoring servers' power is very important, and a design is present for solving existed issues. Building a wireless network with Zigbee technology, there are major modules:End Device with chip CC2530, Zigbee Router with chip CC2530 and CC2591, Zigbee coordinator with chip CC2530 and CC2430.

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Tahsin, Shekha K., Linan Jiang, Neha Sane, Kailie Szewczyk, Hunain Khawaja, Yitshak Zohar et Cindy K. Miranti. « Abstract A073 : Human prostate-on-chip models to define stromal and epithelial interactions in normal and cancerous prostate ». Cancer Research 83, n^o 11_Supplement (2 juin 2023) : A073. http://dx.doi.org/10.1158/1538-7445.prca2023-a073.

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Abstract Background: The secretion of morphogenic factors from the stroma, whose production is dependent on stromal androgen receptor (AR) action, is crucial for maintaining glandular structure and homeostatic function of the prostate gland. However, the precise nature of the factors involved, their regulation, and how they impact homeostasis in the human prostate is not clear. We hypothesize that loss of stromal AR function as seen in prostate cancer progression and during androgen-deprivation therapy likely contribute to tumor progression through disruption of this homeostasis. It is important to understand these interactions in the human context to better aid in improving patient outcomes. Approach: Microfluidic-based technology was used to develop the first human Prostate-on-Chip (PoC) where human prostate fibroblasts are co-cultured with human prostate basal epithelial cells under flow. Addition of androgen to the stromal cells is sufficient to induce luminal cell differentiation on top of the neighboring basal cells – recapitulating the cellular architecture of the human gland. To study prostate cancer in this context, we replaced the normal epithelial cells with tumor cells to interrogate the tumor-stromal interactions; thus, generating a human Prostate Cancer-on-Chip model (PCoC). Cytokine arrays and RT-qPCR was used to identify androgen-induced stromal morphogens and tumor cytokines involved in tumor/stromal interactions. Molecular biology approaches were used to identify the mechanisms involved. Results: Within the PCoC model, tumor cells invaded into the stroma and conversely stromal cells invaded into the tumors. This was accompanied by localized CAF conversion of the stroma. Invasion of tumor cells into the stroma could be blocked with an integrin-α6 binding peptide. Strikingly, the level of AR expression in the stroma was also reduced, recapitulating the loss of stromal AR expression seen in patients. A cytokine array identified TNFα and TGFβ as tumor secreted factors responsible for suppressing stromal AR protein and mRNA expression. TNFα suppressed stromal AR expression in the absence of CAF conversion via NF-κB binding to the AR promoter. On the other hand, p38-MAPK signaling suppressed AR expression independent of TNFα. FGF10 and Wnt16, but not KGF, were identified as androgen-induced stromal secreted morphogens. Loss of stromal AR expression, led to suppression of FGF10 and Wnt16, but not KGF expression. Thus, stromal AR inhibition by tumor secreted TNFα or p38-MAPK signaling suppresses the stromal morphogens required to maintain normal prostate homeostasis. Conclusions: We have developed the first human Prostate-on-Chip and Prostate Cancer-on-Chip models which recapitulate the biology of both the normal human prostate as well as prostate cancer stromal interactions. These models can be used to address a range of clinical problems in cancer development, drug response, and biomarker identification in the context of the tumor microenvironment. This model can easily be adapted for personalized medicine approaches. Citation Format: Shekha K. Tahsin, Linan Jiang, Neha Sane, Kailie Szewczyk, Hunain Khawaja, Yitshak Zohar, Cindy K. Miranti. Human prostate-on-chip models to define stromal and epithelial interactions in normal and cancerous prostate [abstract]. In: Proceedings of the AACR Special Conference: Advances in Prostate Cancer Research; 2023 Mar 15-18; Denver, Colorado. Philadelphia (PA): AACR; Cancer Res 2023;83(11 Suppl):Abstract nr A073.

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Budiarto, Rahmat, Lelyzar Siregar et Deris Stiawan. « Network-on-Chip Paradigm for System-on-Chip Communication ». Computer Engineering and Applications Journal 6, n^o 1 (1 mars 2017) : 1–4. http://dx.doi.org/10.18495/comengapp.v6i1.186.

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Developments of modern technologies in electronics, such as communication, Internet, pervasive and ubiquitous computing and ambient intelligence have figured largely our life. In our day micro-electronic products inspire the ways of learning, communication and entertainment. These products such as laptop computer, mobile phones, and personal handheld sets are becoming faster, lighter in weight, smaller in size, larger in capacity, lower in power consumptions, cheaper and functionally enhanced. This trend will persistently continue. Following this trend, we could integrate more and more complex applications and even systems onto a single chip. The System-on-Chip (SoC) technologies, where complex applications are integrated onto single ULSI chips became key driving force for the developments.

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Chen, Ruei Chang, et Shih Fong Lee. « Design and Layout of a High-Performance PWM Control Class D Amplifiers IC Systems ». Applied Mechanics and Materials 203 (octobre 2012) : 469–73. http://dx.doi.org/10.4028/www.scientific.net/amm.203.469.

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This paper presents the design and implementation of a novel pulse width modulation control class D amplifiers chip. With high-performance, low-voltage, low-power and small area, these circuits are employed in portable electronic systems, such as the low-power circuits, wireless communication and high-frequency circuit systems. This class D chip followed the chip implementation center advanced design flow, and then was fabricated using Taiwan Semiconductor Manufacture Company 0.35-μm 2P4M mixed-signal CMOS process. The chip supply voltage is 3.3 V which can operate at a maximum frequency of 100 MHz. The total power consumption is 2.8307 mW, and the chip area size is 1.1497×1.1497 mm2. Finally, the class D chip was tested and the experimental results are discussed. From the excellent performance of the chip verified that it can be applied to audio amplifiers, low-power circuits, etc.

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Kayashima, Hideto, et Hideharu Amano. « TCI Tester : A Chip Tester for Inductive Coupling Wireless Through-Chip Interface ». Journal of Low Power Electronics and Applications 13, n^o 3 (4 août 2023) : 48. http://dx.doi.org/10.3390/jlpea13030048.

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The building block computation system is constructed by stacking various chips three-dimensionally. The stacked chips incorporate the same TCI IP (Through Chip Interface Intellectual Property) but cannot provide identical characteristics, requiring adjustments in power supply and bias voltage. However, providing characteristics measurement hardware for all chips is difficult due to the limitation of chip area or pin numbers. To address this problem, we developed TCI Tester, a small chip to measure electric characteristics by stacking on TCI of every chip. By stacking two TCI Tester chips, it appears that the up-directional data transfer has a stricter condition than down directional one on power supply voltage and operational frequency. Also, the transfer performance is poorer than designed. Similar measurement results are obtained by stacking TCI Tester on other chips with TCI IP. To investigate the reason, we analyzed the power grid resistance of various chips with the TCI IP. Results also showed that the chips with higher resistance have a narrow operational condition and poorer performance. The results suggest that the power grid design is important for keeping the performance through the TCI channel.

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Li, Jiashen, et Yun Pan. « Optimal scheduling algorithms of system chip power density based on network on chip ». Izvestiya vysshikh uchebnykh zavedenii. Fizika, n^o 9 (2021) : 120–27. http://dx.doi.org/10.17223/00213411/64/9/120.

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The improvement of chip integration leads to the increase of power density of system chips, which leads to the overheating of system chips. When dispatching the power density of system chips, some working modules are selectively closed to avoid all modules on the chip being turned on at the same time and to solve the problem of overheating. Taking 2D grid-on-chip network as the research object, an optimal scheduling algorithm of system-on-chip power density based on network-on-chip (NoC) is proposed. Under the constraints of thermal design power (TDP) and system, dynamic programming algorithm is used to solve the optimal application set throughput allocation from bottom to top by dynamic programming for the number and frequency level of each application configuration processor under the given application set of network-on-chip. On this basis, the simulated annealing algorithm is used to complete the application mapping aiming at heat dissipation effect and communication delay. The open and closed processor layout is determined. After obtaining the layout results, the TDP is adjusted. The maximum TDP constraint is iteratively searched according to the feedback loop of the system over-hot spots, and the power density scheduling performance of the system chip is maximized under this constraint, so as to ensure the system core. At the same time, chip throughput can effectively solve the problem of chip overheating. The experimental results show that the proposed algorithm increases the system chip throughput by about 11%, improves the system throughput loss, and achieves a balance between the system chip power consumption and scheduling time.

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Mohammad, Khader, Ahsan Kabeer et Tarek Taha. « On-Chip Power Minimization Using Serialization-Widening with Frequent Value Encoding ». VLSI Design 2014 (6 mai 2014) : 1–14. http://dx.doi.org/10.1155/2014/801241.

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In chip-multiprocessors (CMP) architecture, the L2 cache is shared by the L1 cache of each processor core, resulting in a high volume of diverse data transfer through the L1-L2 cache bus. High-performance CMP and SoC systems have a significant amount of data transfer between the on-chip L2 cache and the L3 cache of off-chip memory through the power expensive off-chip memory bus. This paper addresses the problem of the high-power consumption of the on-chip data buses, exploring a framework for memory data bus power consumption minimization approach. A comprehensive analysis of the existing bus power minimization approaches is provided based on the performance, power, and area overhead consideration. A novel approaches for reducing the power consumption for the on-chip bus is introduced. In particular, a serialization-widening (SW) of data bus with frequent value encoding (FVE), called the SWE approach, is proposed as the best power savings approach for the on-chip cache data bus. The experimental results show that the SWE approach with FVE can achieve approximately 54% power savings over the conventional bus for multicore applications using a 64-bit wide data bus in 45 nm technology.

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HASHIDA, Takushi, et Makoto NAGATA. « Chip-to-Chip Half Duplex Spiking Data Communication over Power Supply Rails ». IEICE Transactions on Electronics E93-C, n^o 6 (2010) : 842–48. http://dx.doi.org/10.1587/transele.e93.c.842.

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Yuan, Yuxiang, Yoichi Yoshida, Nobuhiko Yamagishi et Tadahiro Kuroda. « Chip-to-Chip Power Delivery by Inductive Coupling with Ripple Canceling Scheme ». Japanese Journal of Applied Physics 47, n^o 4 (25 avril 2008) : 2797–800. http://dx.doi.org/10.1143/jjap.47.2797.

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He, Xun Lai, Qing Hong, Jiu He Ma et Wen Wen Yu. « DC Motor Drive Control Circuit Design Based on IR2103S High-Power Wide Voltage MOSFET ». Advanced Materials Research 1049-1050 (octobre 2014) : 819–23. http://dx.doi.org/10.4028/www.scientific.net/amr.1049-1050.819.

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Based on IR2103S half-bridge drive chip, high-power wide voltage DC motor drive circuit is successfully designed. This paper analyses high power wide voltage DC motor drive control principle, H-bridge drive principle, control characteristics of MOSFET and drive method, moreover, this paper also introduces operating characteristics of wide voltage IR2103S half-bridge drive chip and its control logic and operation modes, in addition, it provides interface method for connecting IR2103S chip and single-chip microcomputer, and measures to control high-power wide voltage DC motor by the single-chip microcomputer.

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Zhang, Jian Qiang, Dan Ya Chen, He Huang et Yun Lu. « Temperature and Humidity Detection System Based on Power Line Communication ». Applied Mechanics and Materials 236-237 (novembre 2012) : 242–46. http://dx.doi.org/10.4028/www.scientific.net/amm.236-237.242.

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Introduction of a intelligence control system of remote temperature & moisture adjustment based on single-chip computer. It explains hardware flow diagram, module structure and system software process flow diagram based on principle of power line carrier transmission and humiture control. With STC12C5404ADsingle chip computer and DHT21 as main control chip and humiture collection chip, the system hard ware is characterized by efficient and strong capacity of resisting disturbance compare to traditional humiture checking system.

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Ren, Yan Ting, et Li Ji Wu. « A Power Analysis System for Cryptographic Devices ». Advanced Materials Research 718-720 (juillet 2013) : 2376–82. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.2376.

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In order to test the security of cryptographic devices against Side Channel Attacks (SCA), an automatic general-purpose power analysis system (TH-PAS-01) is designed and implemented. TH-PAS-01 is scalable and can be applied to many cryptographic devices when specific modules are installed. Using the system TH-PAS-01, correlation power analysis (CPA) are carried out on an AES chip under two working models: normal and shuffling mode. The security level of the countermeasure provided by the target chip is verified by TH-PAS-01. The experimental results show that the correct key of the AES chip is obtained with around 50,000 power traces when the chip was working under normal mode, while the whole key bits are not obtained with 960,000 power traces when the chip works under shuffling mode. The automatic general-purpose system TH-PAS-01 is feasible for security analysis on power analysis for cryptographic devices.

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Johns, Murray E., et Issam Mudawar. « An Ultra-High Power Two-Phase Jet-Impingement Avionic Clamshell Module ». Journal of Electronic Packaging 118, n^o 4 (1 décembre 1996) : 264–70. http://dx.doi.org/10.1115/1.2792162.

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Boiling jet impingement heat transfer from a simulated electronic chip to Fluorinert FC-72 within a clamshell avionic module was investigated for dependence upon inlet fluid temperature, nozzle diameter, nozzle to chip spacing, jet velocity, and chip length. The clamshell module was designed and fabricated to accommodate both single and multiple chip boards and to demonstrate the feasibility of an ultra-high power (on the order of several kilowatts) module. Critical heat flux (CHF) was found to be directly dependent upon subcooling and jet velocity, but relatively unaffected by the nozzle to chip spacing variations examined. The effect of varying the chip size was evaluated and found to produce higher CHF values as chip size was decreased. A correlation accounting for both geometric and subcooling effects was adapted to predict the CHF database with a mean absolute error of 9.6 percent. The module is shown to be capable of dissipating a heat load of 12,000 W at a module flow rate of 8.01 × 10−4 m3/s (12.7 gpm), thus eclipsing the current technology available in avionic cooling.

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Xiong, Xiao Fang, Guo Liang Wu, Bo Tao Wang et Kai Rui Wang. « Study on Electrical Power EPON System ». Advanced Materials Research 722 (juillet 2013) : 139–42. http://dx.doi.org/10.4028/www.scientific.net/amr.722.139.

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In IEEE8023ah Protocols, the uplink bandwidth allocation algorithm is not clearly defined, which depends on the telecommunication device providers. Combined with the strong and multiples services requirements of smart distribution grid, the State Grid developed an OLT chip with QoS mechanism and responded EPON system. Compared with nowadays OLT chip in market, the highlight of our OLT chip is its multiple QoS mechanism. On the respect of dynamic bandwidth allocation, the priority allocate and bandwidth statistic multiplexing functions have been added..

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Kim, Jungwon. « Chip-scale power booster for light ». Science 376, n^o 6599 (17 juin 2022) : 1269. http://dx.doi.org/10.1126/science.abq8422.

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FitzGerald, Susan. « Electronic Chip Runs on Ear Power ». Hearing Journal 66, n^o 4 (avril 2013) : 4. http://dx.doi.org/10.1097/01.hj.0000429418.69162.40.

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Al-Hashimi, Bashir, Enrico Macii et Kaushik Roy. « Editorial : Low-power systems-on-chip ». IEE Proceedings - Computers and Digital Techniques 149, n^o 4 (2002) : 135. http://dx.doi.org/10.1049/ip-cdt:20020550.

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SHIKANO, H., J. SHIRAKO, Y. WADA, K. KIMURA et H. KASAHARA. « Power-Aware Compiler Controllable Chip Multiprocessor ». IEICE Transactions on Electronics E91-C, n^o 4 (1 avril 2008) : 432–39. http://dx.doi.org/10.1093/ietele/e91-c.4.432.

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Titus, A. H., L. Tu et C. S. Mullin. « Autonomous low-power glare sensing chip ». Electronics Letters 47, n^o 8 (2011) : 508. http://dx.doi.org/10.1049/el.2011.0384.

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Vagnon, Eric, Pierre-Olivier Jeannin, Jean-Christophe Crebier et Yvan Avenas. « A Bus-Bar-Like Power Module Based on Three-Dimensional Power-Chip-on-Chip Hybrid Integration ». IEEE Transactions on Industry Applications 46, n^o 5 (septembre 2010) : 2046–55. http://dx.doi.org/10.1109/tia.2010.2057401.

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Fan, Xi, Hou Peng Chen, Qian Wang, Yi Feng Chen, Zhi Tang Song, Min Zhu et Gao Ming Feng. « A Low-Power 1Kb PCRAM Chip with Elevated Write Performance ». Applied Mechanics and Materials 543-547 (mars 2014) : 463–66. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.463.

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A low-power 1Kb phase change random access memory (PCRAM) chip is designed. The chip uses 1T1R (one transistor one resistor) structure and titanium nitride (TiN) bottom electrode (BE) for reducing power consumption. Besides, the write property of the chip is improved by employing a ramp down pulse generator. The chip is fabricated in 130nm CMOS standard technology. The test result shows a 56% power reduction based on TiN BE compared with tungsten (W) BE, which predicts a new direction to realize the commercialization of PCRAM.

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Hsiang, En-Lin, Ziqian He, Yuge Huang, Fangwang Gou, Yi-Fen Lan et Shin-Tson Wu. « Improving the Power Efficiency of Micro-LED Displays with Optimized LED Chip Sizes ». Crystals 10, n^o 6 (8 juin 2020) : 494. http://dx.doi.org/10.3390/cryst10060494.

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Micro-LED (light-emitting diode) is a potentially disruptive display technology, while power consumption is a critical issue for all display devices. In this paper, we develop a physical model to evaluate the power consumption of micro-LED displays under different ambient lighting conditions. Both power efficiency and ambient reflectance are investigated in two types of full color display structures: red/green/blue (RGB) micro-LEDs, and blue-LED pumped quantum dots color-conversion. For each type of display with uniform RGB chip size, our simulation results indicate that there exists an optimal LED chip size, which leads to 30–40% power saving. We then extend our model to analyze different RGB chip sizes, and find that with optimized chip sizes an additional 12% average power saving can be achieved over that with uniform chip size.

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Wang, Chang Hong, Jiang Yun Zhang et Jin Huang. « Thermal Performances Analysis of Microelectronic Chip Cooling System with Thermoelectric Components ». Advanced Materials Research 216 (mars 2011) : 128–33. http://dx.doi.org/10.4028/www.scientific.net/amr.216.128.

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The microelectronic chip thermoelectric cooling equipment and its test system have been developed for the deficiency of the conventional cooling technologies in this paper. The thermal resistance analysis model was applied in research the heat transfer process of the microelectronic chip cooling system and its characteristics. The results show that: When the thermoelectric cooling (TEC) system is in normal operating condition,the Peltier effect is the dominant role in the thermoelectric cooling process despite the opposite actions of the Joule and Fourier effects. The thermal resistance of TEC, which is Q2, decreases when the operating current (I) increases. For the different chip power, there is an optimum current (Iopt) making the interface thermal resistance between chip and TEC minimum (Q1). Q1can obtain the minimum 0.465°C·W-1 when the chip power is 25W and Iopt is 2.4A. The total thermal resistance (Qtotal) firstly decreases and then increases with the increase of operating current. There is an optimum current which allows the total thermal resistance is smallest. Qtotal may obtain the minimum value 0.672°C·W-1 when the chip power is 25W and Iopt is 2.4A. Furthermore, Qtotal Iopt both increase by the chip power.

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Li, Jiashen, et Yun Pan. « Optimal Scheduling Algorithms of System Chip Power Density Based on Network on Chip ». Russian Physics Journal 64, n^o 9 (janvier 2022) : 1715–23. http://dx.doi.org/10.1007/s11182-022-02512-9.

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Sangirov, Jamshid, Ikechi Augustine Ukaegbu, Gulomjon Sangirov, Tae-Woo Lee et Hyo-Hoon Park. « Power-aware transceiver design for half-duplex bidirectional chip-to-chip optical interconnects ». Journal of Semiconductors 34, n^o 12 (décembre 2013) : 125001. http://dx.doi.org/10.1088/1674-4926/34/12/125001.

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Liu, Chunyan, Shujiao Wang et Yanshan Sun. « Design of power control system for student dormitory ». SHS Web of Conferences 166 (2023) : 01058. http://dx.doi.org/10.1051/shsconf/202316601058.

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This design is based on the residential building of boarding school as the research object. The STC89C52RC single-chip microcomputer is used as the main control chip, and the clock chip, temperature chip, smoke collection module, A/D conversion, LED digital tube display circuit, matrix keyboard, infrared wireless remote control and other controllers are used to control the power system and adjust the access control system. This system is applicable to all kinds of colleges and universities that have strict management on students' electricity consumption. It can automatically control the electricity consumption of students' dormitories according to the school management regulations, and can automatically make emergency response to emergencies such as fire.

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Guan, He, Dong Wang, Wentao Li, Duo Liu, Borui Deng et Xiang Qu. « Simulation on an Advanced Double-Sided Cooling Flip-Chip Packaging with Diamond Material for Gallium Oxide Devices ». Micromachines 15, n^o 1 (3 janvier 2024) : 98. http://dx.doi.org/10.3390/mi15010098.

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Gallium oxide (Ga2O3) devices have shown remarkable potential for high-voltage, high-power, and low-loss power applications. However, thermal management of packaging for Ga2O3 devices becomes challenging due to the significant self-heating effect. In this paper, an advanced double-sided cooling flip-chip packaging structure for Ga2O3 devices was proposed and the overall packaging of Ga2O3 chips was researched by simulation in detail. The advanced double-sided cooling flip-chip packaging structure was formed by adding a layer of diamond material on top of the device based on the single-sided flip-chip structure. With a power density of 3.2 W/mm, it was observed that the maximum temperature of the Ga2O3 chip with the advanced double-sided cooling flip-chip packaging structure was 103 °C. Compared with traditional wire bonding packaging and single-sided cooling flip-chip packaging, the maximum temperature was reduced by about 12 °C and 7 °C, respectively. When the maximum temperature of the chip was controlled at 200 °C, the Ga2O3 chip with double-sided cooling packaging could reach a power density of 6.8 W/mm. Finally, by equipping the top of the package with additional water-cooling equipment, the maximum temperature was reduced to 186 °C. These findings highlight the effectiveness of the proposed flip-chip design with double-sided cooling in enhancing the heat dissipation capability of Ga2O3 chips, suggesting promising prospects for this advanced packaging structure.

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Struharik, Rastislav, et Vuk Vranjković. « Striping input feature map cache for reducing off-chip memory traffic in CNN accelerators ». Telfor Journal 12, n^o 2 (2020) : 116–21. http://dx.doi.org/10.5937/telfor2002116s.

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Data movement between the Convolutional Neural Network (CNN) accelerators and off-chip memory is critical concerning the overall power consumption. Minimizing power consumption is particularly important for low power embedded applications. Specific CNN computes patterns offer a possibility of significant data reuse, leading to the idea of using specialized on-chip cache memories which enable a significant improvement in power consumption. However, due to the unique caching pattern present within CNNs, standard cache memories would not be efficient. In this paper, a novel on-chip cache memory architecture, based on the idea of input feature map striping, is proposed, which requires significantly less on-chip memory resources compared to previously proposed solutions. Experiment results show that the proposed cache architecture can reduce on-chip memory size by a factor of 16 or more, while increasing power consumption no more than 15%, compared to some of the previously proposed solutions.

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Hong, Kuo-Bin, Wei-Ta Huang, Hsin-Chan Chung, Guan-Hao Chang, Dong Yang, Zhi-Kuang Lu, Shou-Lung Chen et Hao-Chung Kuo. « High-Speed and High-Power 940 nm Flip-Chip VCSEL Array for LiDAR Application ». Crystals 11, n^o 10 (14 octobre 2021) : 1237. http://dx.doi.org/10.3390/cryst11101237.

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In this paper, we demonstrate the design and fabrication of a high-power, high-speed flip-chip vertical cavity surface emitting laser (VCSEL) for light detection and ranging (LiDAR) systems. The optoelectronic characteristics and modulation speeds of vertical and flip-chip VCSELs were investigated numerically and experimentally. The thermal transport properties of the two samples were also numerically investigated. The measured maximum output power, slope efficiency (SE) and power conversion efficiency (PCE) of a fabricated flip-chip VCSEL array operated at room-temperature were 6.2 W, 1.11 W/A and 46.1%, respectively. The measured L-I-V curves demonstrated that the flip-chip architecture offers better thermal characteristics than the conventional vertical structure, especially for high-temperature operation. The rise time of the flip-chip VCSEL array was 218.5 ps, and the architecture of the flip-chip VCSEL with tunnel junction was chosen to accommodate the application of long-range LiDAR. The calculated PCE of such a flip-chip VCSEL was further improved from 51% to 57.8%. The device design concept and forecasting laser characteristics are suitable for LiDAR systems.

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Vairavan, Rajendaran, Zaliman Sauli, Vithyacharan Retnasamy, Nazuhusna Khalid, K. Anwar et Nooraihan Abdullah. « Natural Heat Convection Analysis on Cylindrical Al Slug of LED ». Applied Mechanics and Materials 487 (janvier 2014) : 536–39. http://dx.doi.org/10.4028/www.scientific.net/amm.487.536.

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This paper presents the characterization of a single chip high power LED package through simulation. Ansys version 11 was used for the simulation. The characterization of the LED package with aluminum cylindrical heat slug was carried out under natural convection condition at ambient temperature of 25°C. The junction temperature and the stress of the LED chip was assesed. The LED chip was powered with input power of 0.1 W and 1 W and the heat dissipation was assesed. Results showed that that the junction temperature and the Von Mises Stress of the single chip LED package increases with the increased input power.

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Chen, Shih-Lun, Tsun-Kuang Chi, Min-Chun Tuan, Chiung-An Chen, Liang-Hung Wang, Wei-Yuan Chiang, Ming-Yi Lin et Patricia Angela R. Abu. « A Novel Low-Power Synchronous Preamble Data Line Chip Design for Oscillator Control Interface ». Electronics 9, n^o 9 (14 septembre 2020) : 1509. http://dx.doi.org/10.3390/electronics9091509.

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In this paper, a novel low-power synchronous preamble data line protocol chip design for serial communication is proposed. The serial communication only uses two wires, chip select (CS) and secure digital (SD), to transmit and receive data between two devices. The proposed protocol aims to use a fewer number of wires for the interface, therefore reducing the complexity as well as the area of the chip design. Moreover, it increases the efficiency through a synchronous serial communication-controlled oscillator. The low-power synchronous preamble data line protocol design was successfully verified using a field-programmable gate array (FPGA) as a master device and a real chip as a slave device. The signals are checked through the use of a logic analyzer. The realized low-power synchronous preamble data line protocol chip design has a gate count of only 5.07 K gates, a low power dissipation of 12 mW, and a chip area of 453,260 μm2 using the Taiwan semiconductor manufacturing company (TSMC) 0.18 μm CMOS process. Compared with the three-wire serial peripheral interface (SPI) protocol, the proposed design has the advantages of having a lower cost and a lower power consumption.

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Yan, Lei, Peisheng Liu, Pengpeng Xu, Lipeng Tan et Zhao Zhang. « Reliability Analysis of Flip-Chip Packaging GaN Chip with Nano-Silver Solder BUMP ». Micromachines 14, n^o 6 (13 juin 2023) : 1245. http://dx.doi.org/10.3390/mi14061245.

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Gallium nitride (GaN) power devices have many benefits, including high power density, small footprint, high operating voltage, and excellent power gain capability. However, in contrast to silicon carbide (SiC), its performance and reliability can be negatively impacted by its low thermal conductivity, which can cause overheating. Hence, it is necessary to provide a reliable and workable thermal management model. In this paper, a model of a flip-chip packing (FCP) GaN chip was established, and it was assigned to the Ag sinter paste structure. The different solder bumps and under bump metallurgy (UBM) were considered. The results indicated that the FCP GaN chip with underfill was a promising method because it not only reduced the size of the package model but also reduced thermal stress. When the chip was in operation, the thermal stress was about 79 MPa, only 38.77% of the Ag sinter paste structure, lower than any of the GaN chip packaging methods currently in use. Moreover, the thermal condition of the module often has little to do with the material of the UBM. Additionally, nano-silver was found to be the most suitable bump material for FCP GaN chip. Temperature shock experiments were also conducted with different UBM materials when nano-silver was used as bump. It was found that Al as UBM is a more reliable option.

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Ding, Xijie, Juan Huang, Zuoli Zhang et Yisen Yu. « A Low Frequency Power Amplifier Design Based on Output CapacitorLess Circuit ». Academic Journal of Science and Technology 11, n^o 1 (21 mai 2024) : 169–73. http://dx.doi.org/10.54097/ne5xme81.

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This low-frequency power amplifier utilizes the AT89S51 microcontroller as the main control chip. The system can be divided into several modules: power amplification circuit module, pre-amplification module, band-stop filtering module, protection circuit module, volume control module, power supply voltage, AC voltage, and AC current testing module, A/D conversion module, power module, and single-chip microcomputer subsystem control module. We chose class AB audio power amplifiers. To ensure circuit stability and higher fidelity, we selected the TDA2030 integrated chip to build the OCL power amplifier circuit, preventing efficiency from being too low. Through the control of single-chip microcomputer subsystem, it can measure and display output power, the supply power of the DC power source, and overall efficiency. This system utilizes electronic switches connected with band-stop filters, with the band-stop frequency ranging from 40～60Hz.

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Duan, Shihua, Dejian Li, Yuan Guan, Bofu Li, Dameng Li, Baobin Yang et Shunfeng Han. « Optimization of Package Heat Dissipation Design Based on High-power WB-BGA Industrial Chip with a Wide Temperature Range ». Journal of Physics : Conference Series 2645, n^o 1 (1 novembre 2023) : 012003. http://dx.doi.org/10.1088/1742-6596/2645/1/012003.

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Abstract With the progress of science and technology, chip integration and packaging density continue to improve, and the power density increases rapidly, leading to the increasingly prominent problem of chip heat dissipation. The service environment of industrial chips with a wide temperature range is even worse, so it is necessary to ensure reliable operation in the environment of −40°C~85°C. The thermal design and thermal management of packaging have become an important problem in the industry. Based on the wide temperature range of high-power WB-BGA industrial chips, aiming at the difficulty of chip heat dissipation in the high-temperature environment of 85°C, this paper studies and optimizes the packaging heat dissipation, and proposes a high heat dissipation packaging design scheme based on the wide temperature-range high-power WB-BGA industrial chip, which reduces the chip junction temperature by 17.9°C and has a certain reference value for the packaging design of wide temperature range industrial chip.

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Budell, Timothy, et Eric Tremble. « PCB Effects on On-chip Capacitor Requirements and an Efficient Resonance-Prevention ASIC Methodology ». International Symposium on Microelectronics 2010, n^o 1 (1 janvier 2010) : 000392–99. http://dx.doi.org/10.4071/isom-2010-wa2-paper1.

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A method for determining adequate quantities and locations of on-chip capacitors to maintain supply voltages at all locations on a chip within pre-specified limits given the switching activity of on-chip circuits was presented in [3]. In this paper, we extend the method to include current flow from the package and PCB. The effects of on-chip capacitance and other system parasitics on the time it takes for additional supply current to flow into a chip are discussed. The relationship between switching current, capacitance, system parasitic inductances, and on-chip noise is presented. These concepts are then applied to the subject of power delivery network (PDN) resonance. A 1-dimensional model for simulating PDN resonance is presented. The model includes chip, package, and PCB components, along with explicit networks for each chip power supply and their interactions. The topology of the model and the contributions of each model component are described. A design methodology for avoiding PDN resonance, presently in use on all IBM ASIC modules, is presented.

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Wang, Chenyuan, Yigang He, Chuankun Wang, Lie Li et Xiaoxin Wu. « Multi-Chip IGBT Module Failure Monitoring Based on Module Transconductance with Temperature Calibration ». Electronics 9, n^o 10 (23 septembre 2020) : 1559. http://dx.doi.org/10.3390/electronics9101559.

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The Insulated Gate Bipolar Transistor (IGBT) is the component with the highest failure rate in power converters, and its reliability is a critical issue in power electronics. IGBT module failure is largely caused by solder layer fatigue or bond wires fall-off. This paper proposes a multi-chip IGBT module failure monitoring method based on the module transconductance, which can accurately monitor IGBT module chip failures and bond wire failures. The paper first introduces the failure mechanism and module structure of the multi-chip IGBT module; then, it proposes a reliability model based on the module transconductance and analyzes the relationship between chip failure, bond wire failure, and the transmission characteristic curve of the IGBT module. Finally, the module transconductance under chip failure and bond wire failure is measured and calculated through simulation, and the temperature is calibrated, which can eliminate the influence of temperature on health monitoring. The results show that the method has a high sensitivity to chip failures and bond wire failures, can realize the failure monitoring of multi-chip IGBT modules, and is of great significance for improving the reliability of power converters.

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Wang, Xin Huan, Xue Juan Li et Shuo Wang. « Design on Digital PWM Inverter Power Based on SA4828 ». Applied Mechanics and Materials 273 (janvier 2013) : 296–99. http://dx.doi.org/10.4028/www.scientific.net/amm.273.296.

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The design scheme of three-phase inverter power which was combined with AT89S52 single-chip microcomputer and three-phase IC chip SA4828 was given in this article and the main power circuit, control circuit, isolation, driven circuit and the software flow chart were introduced. The whole system adopted SA4828 to generate the sine pulse width modulation signal (SPWM), which simplified control circuit, reduced costs and improved the system reliability. At the same time, the interface between SA4828 and single-chip microcomputer was simple and convenient, moreover, the program of SA4828 was simple and the SPWM signal was digital, especially when the output frequency and amplitude remained unchanged, the single-chip microcomputer needn’t intervene in SA4828, which saved computer times and improved the speediness and real-timeliness.

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Wu, Lei, Xiao Yun Xiong et De Xing Wang. « Efficient Heat Dissipation Design of High-Power Multi-Chip Cob Package Led Modules ». Advanced Materials Research 463-464 (février 2012) : 1332–40. http://dx.doi.org/10.4028/www.scientific.net/amr.463-464.1332.

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In this study, the junction temperature (Tj) and thermal resistance (Rth) of five high-power multi-chip COB (chip-on-board) LED packages with different chip spacings were compared. The actual Tjwas measured by an IR camera and compared with the simulation results from a computational fluid dynamics (CFD) software. In addition, the effects of heat slugs with different thermal conductivity, heat sinks of various thicknesses, chip size, and forced convection cooling on the Tjand Rthof high-powered LED components were investigated. The experimental results show that smaller chip spacing resulted in higher Tjand Rth. The heat dissipation performance can be improved by using a heat slug with a high thermal conductivity; and increasing the thickness of the heat sink, or employing forced convection cooling.

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Pang, Li Fei. « Thermal Design of Power IC Chip Based on Icepak ». Applied Mechanics and Materials 456 (octobre 2013) : 278–81. http://dx.doi.org/10.4028/www.scientific.net/amm.456.278.

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There was a thermal model established for the packaged power IC chip which is usually used in the design of a class amplifier. After the theoretical analysis of the equivalent chip thermal resistance model carried out on the basis of thermal resistance theory, the optimization and calculation of the baseboard's material and thickness were simulated with Icepak. The acceptable thermal structure of was showed as suggestions for the reliability of chip with discussions of the simulation.

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Lie, D. Y. C. « “RF-SoC” : Integration Trends of On-Chip CMOS Power Amplifier : Benefits of External PA versus Integrated PA for Portable Wireless Communications ». International Journal of Microwave Science and Technology 2010 (14 mars 2010) : 1–7. http://dx.doi.org/10.1155/2010/380108.

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RFIC integration has seen dramatic progress since the early 1990s. For example, Si-based single-chip products for GSM, WLAN, Bluetooth, and DECT applications have become commercially available. However, RF power amplifiers (PAs) and switches tend to remain off-chip in the context of single-chip CMOS/BiCMOS transceiver ICs for handset applications. More recently, several WLAN/Bluetooth vendors have successfully integrated less demanding PAs onto the transceivers. This paper will focus on single-chip RF-system-on-a-chip (i.e., “RF-SoC”) implementations that include a high-power PA. An analysis of all tradeoffs inherent to integrating higher power PAs is provided. The analysis includes the development cost, time-to-market, power efficiency, yield, reliability, and performance issues. Recent design trends on highly integrated CMOS WiFi transceivers in the literature will be briefly reviewed with emphasis on the RF-SoC product design tradeoffs impacted by the choice between integrated versus external PAs.

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