Tesi: "Field Programmable Gate Arrays"

1

Howard, Neil John. "Defect-tolerant Field-Programmable Gate Arrays". Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359290.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Hall, Tyson Stuart. "Field-Programmable Analog Arrays: A Floating-Gate Approach". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-07122004-124607/unrestricted/hall%5Ftyson%5Fs%5F200407%5Fphd.pdf.

Testo completo

Abstract (sommario):

Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2005. Directed by David Anderson.
Prvulovic, Milos, Committee Member ; Citrin, David, Committee Member ; Lanterman, Aaron, Committee Member ; Yalamanchili, Sudhakar, Committee Member ; Hasler, Paul, Committee Member ; Anderson, David, Committee Chair. Includes bibliographical references.

Gli stili APA, Harvard, Vancouver, ISO e altri

3

Leong, David Chin Kuang. "Incremental placement for field-programmable gate arrays". Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/31671.

Testo completo

Abstract (sommario):

As the logic capacity of FPGAs continues to increase with deep submicron technology, performing a full recompilation for small iterative changes in a large design is an extremely time-consuming and costly process. To address this issue, this thesis presents a new incremental placement algorithm for FPGAs named "iPlace" that significantly reduces the time required for recompilation. The iPlace algorithm is based on shifting, compaction, and annealing. Key ideas from the algorithm include a placement super-grid that is larger than the physical size of the FPGA. The super-grid allows insertion of additional CLBs into areas with no free locations by CPU-efficient shifting. This is followed by a compaction scheme to re-legalize CLBs that are shifted to illegal locations outside of the physical size of the FPGA. The algorithm ends with a low-temperature anneal to improve quality. This algorithm is capable of handling multiple design changes across large regions of a FPGA. This is especially useful for hierarchical designs where sub-circuits are re-used multiple times. If one such sub-circuit is modified, iPlace can quickly produce a high quality incremental placement solution. For a single region of design change, we found that iPlace is 34 to 260 times faster than the academic tool Versatile Place and Route (VPR) in default mode. Compared to VPR's reduced-quality "-fast" placement option, iPlace is 3 to 28 times faster with equivalent quality. For multiple regions of design changes, iPlace is still 50-70 times faster compared to VPR in default mode when up to 2/3 of the CLBs are modified; Compared to the "-fast" placement option, iPlace is still 5-8 times faster. We believe that iPlace is the first academically available incremental placement algorithm capable of handling significant changes to a netlist for very large circuits.
Applied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Messa, Norman C. "Design implementation into field programmable gate arrays". Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/26451.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Niu, Jianyong. "Digital control using field programmable gate arrays". Thesis, University of Sheffield, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434507.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Lu, Aiguo. "Logic synthesis for field programmable gate arrays". Thesis, University of Bristol, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295061.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Newalkar, Aditya. "Alternative techniques for Built-In Self-Test of Field Programmable Gate Arrays". Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Summer/master's/NEWALKAR_ADITYA_6.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Карнаушенко, В. П., e А. В. Бородин. "Field Programmable Counter Arrays Integration with Field Programmable Gates Arrays". Thesis, NURE, MC&FPGA, 2019. https://mcfpga.nure.ua/conf/2019-mcfpga/10-35598-mcfpga-2019-004.

Testo completo

Abstract (sommario):

Field Programmable Counter Arrays (FPCAs) have been recently introduced to close the gap between Field Programmable Gates Arrays (FPGA) and Application Specified Integrated Circuits (ASICs) for arithmetic dominated applications. FPCAs are reconfigurable lattices that can be embedded into FPGAs to efficiently compute the result of multi-operand additions.

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Vachranukunkiet, Petya Nagvajara Prawat Johnson Jeremy. "Power flow computation using field programmable gate arrays /". Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/1789.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Camus, Dominic Roger. "Improved logic optimisation for field programmable gate arrays". Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301840.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

11

James, Calvin L. "COMPLEX WAVEFORM GENERATION UTILIZING FIELD PROGRAMMABLE GATE ARRAYS". International Foundation for Telemetering, 1997. http://hdl.handle.net/10150/609692.

Testo completo

Abstract (sommario):

International Telemetering Conference Proceedings / October 27-30, 1997 / Riviera Hotel and Convention Center, Las Vegas, Nevada
The basic building blocks for implementing complex waveform generators using a look-up table approach are random access memory (RAM) and read only memory (ROM) devices. Due to technological advancements in field programmable gate array (FPGA) development, these devices have the ability to allocate large amounts of memory elements within the same structure. The self containment property makes the FPGA a suitable topology for complex waveform generation applications. In addition, this self containment property significantly reduces implementation costs by reducing the number of external components required to support many applications. This paper examines the use of FPGA’s in various complex waveform generation applications. In particular, a discussion will ensue examining possible mappings of the time domain response of the complex waveform into memory elements of the FPGA. The analyses and examples contained in the sequel are from existing waveform generation applications, developed for Gauissian Minimum Shift Keying (GMSK) and Unbalanced Quadriphase Shift Keying (UQPSK) modulation formats.

Gli stili APA, Harvard, Vancouver, ISO e altri

12

Malik, Usama Computer Science &amp Engineering Faculty of Engineering UNSW. "Configuration encoding techniques for fast FPGA reconfiguration". Awarded by:University of New South Wales. School of Computer Science and Engineering, 2006. http://handle.unsw.edu.au/1959.4/26212.

Testo completo

Abstract (sommario):

This thesis examines the problem of reducing reconfiguration time of an island-style FPGA at its configuration memory level. The approach followed is to examine configuration encoding techniques in order to reduce the size of the bitstream that must be loaded onto the device to perform a reconfiguration. A detailed analysis of a set of benchmark circuits on various island-style FPGAs shows that a typical circuit randomly changes a small number of bits in the {\it null} or default configuration state of the device. This feature is exploited by developing efficient encoding schemes for configuration data. For a wide set of benchmark circuits on various FPGAs, it is shown that the proposed methods outperform all previous configuration compression methods and, depending upon the relative size of the circuit to the device, compress within 5\% of the fundamental information theoretic limit. Moreover, it is shown that the corresponding decoders are simple to implement in hardware and scale well with device size and available configuration bandwidth. It is not unreasonable to expect that with little modification to existing FPGA configuration memory systems and acceptable increase in configuration power a 10-fold improvement in configuration delay could be achieved. The main contribution of this thesis is that it defines the limit of configuration compression for the FPGAs under consideration and develops practical methods of overcoming this reconfiguration bottleneck. The functional density of reconfigurable devices could thereby be enhanced and the range of potential applications reasonably expanded.

Gli stili APA, Harvard, Vancouver, ISO e altri

13

Koh, Shannon Computer Science &amp Engineering Faculty of Engineering UNSW. "Generating the communication infrastracture for module-based dynamic reconfiguration of FPGas". Publisher:University of New South Wales. Computer Science & Engineering, 2008. http://handle.unsw.edu.au/1959.4/41418.

Testo completo

Abstract (sommario):

Current approaches to supporting module-based FPGA reconfiguration focus on various aspects and sub-problems in the area but do not combine to form a coherent, top-down methodology that factors low-level device parameters into every step of the design flow. This thesis proposes such a top-down methodology from application specification to low-level implementation, centered around examining the problem of generating a point-to-point communications infrastructure to support the changing interfaces of dynamically placed modules. Low-level implementation parameters are considered at every stage to ensure that area, timing and budget constraints of the application are met. The approach advocates the regular layout of modules surrounded by a wiring harness supporting the communications for those modules, and thus provides an advanced understanding of how to implement the "fixed wiring harness" model of reconfigurable computing proposed by Brebner. Results have shown that compared to flattened net lists the regularity of the layout does not impose significant overheads on critical path delays. At high communication densities it can even result in lower delays. The core of the methodology is an infrastructure generation process that allocates modules to slots and merges configuration graphs to form wiring harnesses that support the communications for these merged configurations. This thesis suggests methods and evaluates algorithms for configuration graph merging so as to reduce run-time reconfiguration overheads. Initial experiments with a greedy merging algorithm performed on an optical flow application resulted in a substantial reduction of 64% in reconfiguration time. The effects of graph merging with the initial greedy algorithm and an improved dynamic programming algorithm were explored for a range of device sizes and architectural parameters. Results show that configuration merging using the greedy method results in significant reductions to the reconfiguration delay. The dynamic programming algorithm provides consistent improvements above and beyond the savings provided by the greedy method. In addition, a strong correlation was identified between the quality of front-end design activities such as partitioning and the effectiveness of back-end implementations. The methodology is integrated into the Xilinx commercial tool flow for partial reconfiguration, and is effective for implementing applications for module-based FPGA reconfiguration where the modules and their communications requirements are known at design time. It also allows a system designer to consider alternate device sizes and parameters until a set is found that satisfies the application constraints.

Gli stili APA, Harvard, Vancouver, ISO e altri

14

Wood, Christopher Landon. "Runtime partial FPGA reconfiguration". Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/15051.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

15

Galindo, Juan Manuel. "A novel partial reconfiguration methodology for FPGAs of multichip systems /". Online version of thesis, 2008. http://hdl.handle.net/1850/7784.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

16

Rajagopalan, Kamal. "An FPGA architecture for improved arithmetic performance /". St. Lucia, Qld, 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16460.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

17

Gray, Jordan D. "Application of Floating-Gate Transistors in Field Programmable Analog Arrays". Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7540.

Testo completo

Abstract (sommario):

Floating-gate transistors similar to those used in FLASH and EEPROM can be used to build reconfigurable analog arrays. The charge on the floating gate can be modified to pass or block a signal in a cross-bar switch matrix, or it can be finely tuned to eliminate a threshold difference across a chip or set a bias. By using such a compact and versatile reconfigurable analog memory element, the number of analog circuit components included on an integrated circuit that is field-programmable is significantly higher. As a result, large-scale FPAAs can be built with the same impact on analog design that FPGAs have had on digital design. In my research, I investigate the areas floating-gate transistors can be used to impact FPAA design and implementation. An FPAA can be broken up into two basic components, elements of connection and elements of computation. With respect to connection, I show that a floating-gate switch can be used in a cross-bar matrix in place of a transmission gate resulting in less parasitic capacitance and a more linear resistance for the same size transistor. I illuminate the programming issues relating to injecting a floating-gate for use as a switch, including the drain selection circuitry and rogue injection due to gate induced drain leakage. With respect to computation, I explain how a Multiple-Input Translinear Element, or MITE, can be augmented to fit in an FPAA framework. I also discuss two different MITE implementations compatible with CMOS technology, a subthreshold MOS design and a BJT MITE that uses a lateral BJT. Beyond FPAA components, I present two alternative FPAA systems. The first is a general purpose reconfigurable analog system that uses standard analog design components that have been augmented with floating-gates. The second FPAA is built upon MITE circuits, and is focused on supporting direct system synthesis. I conclude with a discussion of a future large-scale MITE FPAA.

Gli stili APA, Harvard, Vancouver, ISO e altri

18

Källström, Petter. "Direct Digital Frequency Synthesis in Field-Programmable Gate Arrays". Thesis, Linköping University, Department of Electrical Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56550.

Testo completo

Abstract (sommario):

This thesis is about creation of a Matlab program that suggests and automatically generates a Phase to Sine Amplitude Converter (PSAC) in the hardware language VHDL, suitable for Direct Digital Frequency Synthesis (DDFS). Main hardware target is Field Programmable Gate Arrays (FPGAs).

Focus in this report is how an FPGA works, different methods for sine amplitude generation and their signal qualities vs the hardware resources they use.

Detta exjobb handlar om att skapa ett Matlab-program som föreslår och implementerar en sinusgenerator i hårdvaruspråket VHDL, avsedd för digital frekvenssyntes (DDFS). Ämnad hårdvara för implementeringen är en fältprogrammerbar grindmatris (FPGA).

Fokus i denna rapport ligger på hur en FPGA är uppbyggd, olika metoder för sinusgenerering och vilka kvaliteter på sinusvågen de ger och vilka resurser i hårdvaran de använder.

Gli stili APA, Harvard, Vancouver, ISO e altri

19

Mutlu, Baris Ragip. "Real-time Motion Control Using Field Programmable Gate Arrays". Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612049/index.pdf.

Testo completo

Abstract (sommario):

In this thesis, novel implementation methods for FPGA based real-time motion control systems are investigated. These methods are examined for conventional and modern controller topologies as well as peripheral device interfaces which are mutually essential pieces of a motion controller. The developed methods are initially tested one by one to assess the performance of the individual design
and finally an assembled solution is developed to test the overall design. Tests of the overall design are realized via hardware-in-the-loop simulation of a real-world control problem, selected as a CNC machining center. The developed methods are discussed in terms of their success, resource consumptions and attainable sampling rates.

Gli stili APA, Harvard, Vancouver, ISO e altri

20

Raina, Baljit Singh. "Delay-optimized placement in symmetrical field-programmable gate arrays". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ31862.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

21

Tickle, Andrew Jason. "Applications of Morphological Operators on Field Programmable Gate Arrays". Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507628.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

22

Ambat, Shadab Gopinath. "SINGLE EVENT UPSET DETECTION IN FIELD PROGRAMMABLE GATE ARRAYS". UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/511.

Testo completo

Abstract (sommario):

The high-radiation environment in space can lead to anomalies in normal satellite operation. A major cause of concern to spacecraft-designers is the single event upset (SEU). SEUs can result in deviations from expected component behavior and are capable of causing irreversible damage to hardware. In particular, Field Programmable Gate Arrays (FPGAs) are known to be highly susceptible to SEUs. Radiation-hardened versions of such devices are associated with an increase in power consumption and cost in addition to being technologically inferior when compared to contemporary commercial-off-the-shelf (COTS) parts. This thesis consequently aims at exploring the option of using COTS FPGAs in satellite payloads. A framework is developed, allowing the SEU susceptibility of such a device to be studied. SEU testing is carried out in a software-simulated fault environment using a set of Java classes called JBits. A radiation detector module, to measure the radiation backdrop of the device, is also envisioned as part of the final design implementation.

Gli stili APA, Harvard, Vancouver, ISO e altri

23

Self, R. P. "Software-orientated system design for field programmable gate arrays". Thesis, University of Essex, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397736.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

24

Sharma, Akshay. "Place and route techniques for FPGA architecture advancement /". Thesis, Connect to this title online; UW restricted, 2005. http://hdl.handle.net/1773/6108.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

25

Shen, Ying. "Compiling a synchronous programming language into field programmable gate arrays". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0029/MQ47476.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

26

Sareen, Aman. "Reconfigurable design for pattern recognition using field programmable gate arrays". Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175625525.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

27

Dixon, Bobby Earl Stroud Charles E. "Built-in self-test of the programmable interconnect in field programmable gate arrays". Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/FALL/Electrical_and_Computer_Engineering/Thesis/Dixon_Bobby_16.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

28

Brown, Simon James. "Fault-tolerance of field-programmable gate arrays subjected to radiation". Thesis, University of Salford, 2010. http://usir.salford.ac.uk/26592/.

Testo completo

Abstract (sommario):

This thesis describes a technology and methodology designed and developed for the study of certain aspects of reliability in digital electronics sub-systems, as implemented on field-programmable gate arrays (FPGAs), while being subjected to small-scale sources of radiation. The technology developed is in the form of a platform for the FPGA under investigation, and an associated configuration and test system. The platforms for the devices are exchangeable, so that a range of different generations, manufacturers and models of FPGA, or other processing element, can be investigated. The circuit boards have been designed to fit inside a small volume, in order to be accommodated by a typical laboratory desk-top source of radiation such as neutrons, alpha or beta particles. To maximise it's usefulness, the test system was designed to be used for a wide range of investigations and prototyping projects. In order to prove the applicability of the system developed, an experiment was run. A triple-module redundant (TMR) system is constructed to test the raw susceptibility of the underlying FPGAs to faults, and to test how well the TMR system copes with correcting such errors. This is done while the whole system is subjected to ionizing radiation in the form of neutrons. This reveals the effects of radiation on the ICs, and provides an accelerated test for tolerance to other potential causes of faults. We are looking for - - confirmation of theory and other's measurements on upset rate - confirmation that fault-tolerance works We conclude that: (1) the experimental test system passed the required tests and measurements, and produces results, (2) the SEU rate, as measured in the example experiment, is consistent with expectations, and (3) a conventional commercial FPGA, programmed to perform a function reliably using triple-module redundancy, will indeed continue to perform correctly under the influence of SEU-inducing radiation.

Gli stili APA, Harvard, Vancouver, ISO e altri

29

MacQueen, Daniel Montgomery. "Total ionizing dose effects on Xilinx field-programmable gate arrays". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ59840.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

30

Royal, Andrew Peter. "Globally asynchronous locally synchronous interconnect for field programmable gate arrays". Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415717.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

31

Gundam, Madhuri. "Implementation of Directional Median Filtering using Field Programmable Gate Arrays". ScholarWorks@UNO, 2010. http://scholarworks.uno.edu/td/111.

Testo completo

Abstract (sommario):

Median filtering is a non-linear filtering technique which is effective in removing impulsive noise from data. In this thesis, directional median filtering has been implemented using cumulative histogram of samples in several directions. Different methods to implement directional median filtering have been proposed. The filtered images are smoothed along the direction of the filtering window. All implementations aimed to generate outputs in the least amount of time, while reducing the resource utilization on hardware. The implementation methods were designed for Xilinx Virtex 5 FPGA devices but were also attempted on Spartan 3E. The proposed methods used less than 30% of the resources on Virtex 5 FPGA but the resource utilization on Spartan 3E exceeded the number of available resources. After an initial delay, methods 1 and 2 generate a new output for every 5 clock cycles while method 3 generates an output for every 1.5 clock cycles.

Gli stili APA, Harvard, Vancouver, ISO e altri

32

Davis, James. "Low-overhead fault-tolerant logic for field-programmable gate arrays". Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/44382.

Testo completo

Abstract (sommario):

While allowing for the fabrication of increasingly complex and efficient circuitry, transistor shrinkage and count-per-device expansion have major downsides: chiefly increased variation, degradation and fault susceptibility. For this reason, design-time consideration of faults will have to be given to increasing numbers of electronic systems in the future to ensure yields, reliabilities and lifetimes remain acceptably high. Many mathematical operators commonly accelerated in hardware are suited to modification resulting in datapath error detection and correction capabilities with far lower area, performance and/or power consumption overheads than those incurred through the utilisation of more established, general-purpose fault tolerance methods such as modular redundancy. Field-programmable gate arrays are uniquely placed to allow further area savings to be made thanks to their dynamic reconfigurability. The majority of the technical work presented within this thesis is based upon a benchmark hardware accelerator - a matrix multiplier - that underwent several evolutions in order to detect and correct faults manifesting along its datapath at runtime. In the first instance, fault detectability in excess of 99% was achieved in return for 7.87% additional area and 45.5% extra latency. In the second, the ability to correct errors caused by those faults was added at the cost of 4.20% more area, while 50.7% of this - and 46.2% of the previously incurred latency overhead - was removed through the introduction of partial reconfiguration in the third. The fourth demonstrates further reductions in both area and performance overheads - of 16.7% and 8.27%, respectively - through systematic data width reduction by allowing errors of less than ±0.5% of the maximum output value to propagate.

Gli stili APA, Harvard, Vancouver, ISO e altri

33

Papadonikolakis, Markos. "Mapping of support vector machines on field programmable gate arrays". Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/10004.

Testo completo

Abstract (sommario):

Support Vector Machines (SVMs) are a powerful supervised learning method in the field of Machine Learning, which has drawn a lot of attention in the last two decades due to their high effectiveness and demonstrated prediction accuracy for a wide range of classification and regression tasks. Belonging to the class of supervised learning, this method comprises of two distinct phases, the SVM training and classification. When targeting large-scale problems, both SVM training and classification phases suffer from high execution times, due to their superlinear dependencies on the problem’s dimensionality and size. Therefore, that is an urgent need to accelerate these heavy load tasks, especially when the application imposes real-time constraints. The evolution and technology improvements on reconfigurable logic and, more specifically, the Field Programmable Gate Arrays (FPGAs) allow for the dedication of hardware resources to accelerate time consuming tasks. In the SVM case this is highly favorable, due to the potential for parallelization that the SVM training and classification tasks present. Moreover, many real-world classification problems present different and diverse precision and dynamic range requirements among their features. This is a strong motivation for the investigation and proposal of hardware-mapped architectures to accelerate the SVM training and classification. The FPGAs, due to their inherited custom-arithmetic potential and reconfigurability allow for the exploitation of this heterogeneity of different classification problems. This work focuses on the proposal of hardware-oriented architectures which can exploit the FPGA’s parallel processing potential, the reconfigurability and their custom precision-arithmetic in efficient ways, in order to accelerate the computational intensive tasks of SVM training and classification. The objective is to create highly scalable and adaptive FPGA architectures, which are able to maximize the utilized parallelization of the hardware resources, with respect to the problem’s characteristics and the application’s resource constraints. In this context, this work has proposed a heterogeneous FPGA architecture for the SVM training which allows for the exploitation of the targeted problem’s characteristics, such as the dimensionality and the precision requirements. The proposed architecture is a fully scalable solution, which maps the available FPGA resources in efficient ways, in order to increase parallelism and improve the SVM training performance. The scalability of the FPGA architecture is enhanced by the proposal of an algorithmic flow that balances the utilization of the heterogeneous resources allows for designing problem-specific circuits. This proposed FPGA architecture outperforms previous hardware-mapped approaches by more than 3 times in raw computational power. Further highlighting the achievements of this PhD work, this heterogeneous mapping idea is also exploited for the SVM classification, resulting in the proposal of the first cascade FPGA-based classifier, which exploits the FPGA reconfigurability in order to further improve the SVM classification time performance. For instance, this proposed architecture achieves in doubling the front-end system throughput of the SVM classification by a factor of 2 on a popular dataset, without introducing any resource utilization penalty.

Gli stili APA, Harvard, Vancouver, ISO e altri

34

Potgieter, Juan-Pierre. "Single event upset testing of flash based field programmable gate arrays". Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/12520.

Testo completo

Abstract (sommario):

In the last 50 years microelectronics have advanced at an exponential rate, causing microelectronic devices to shrink, have very low operating voltages and increased complexities; all this has made circuits more sensitive to various kinds of failures. These trends allowed soft errors, which up until recently was just a concern for space application, to become a major source of system failures of electronic products. The aim of this research paper was to investigate different mitigation techniques that prevent these soft errors in a Video Graphics Array (VGA) controller which is commonly used in projecting images captured by cameras. This controller was implemented on a Flash Based Field Programmable Gate array (FPGA). A test set-up was designed and implemented at NRF iThemba LABS, which was used to conduct the experiments necessary to evaluate the effectiveness of different mitigation techniques. The set-up was capable of handling multiple Device Under Tests (DUT) and had the ability to change the angle of incidence of each DUT. The DUTs were radiated with a 66MeV proton beam while the monitoring equipment observed any errors that had occurred. The results obtained indicated that all the implemented mitigation techniques tested on the VGA system improved the system’s capability of mitigating Single Event Upsets (SEU). The most effective mitigation technique was the OR-AND Multiplexer Single Event Transient (SET) filter technique. It was thus shown that mitigation techniques are viable options to prevent SEU in a VGA controller. The permanent SEU testing set-up which was designed and manufactured and was used to conduct the experiments, proved to be a practical option for further microelectronics testing at iThemba LABS.

Gli stili APA, Harvard, Vancouver, ISO e altri

35

Ortiz, Gual Fernando Enrique. "Novel reconfigurable computing architectures for embedded high performance signal processing and numerical applications". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 1.73 Mb., 102 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3221141.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

36

Milton, Daniel. "Built-in self test of configurable memory resources in field programmable gate arrays". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/MILTON_DANIEL_9.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

37

Lin, Yu Colin, e 林郁. "ArchSyn: an energy-efficient FPGA high-level synthesizer". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49799599.

Testo completo

Abstract (sommario):

Due to their high potential performance and reduced energy and power consumption, field-programmable gate arrays (FPGAs) are widely used as accelerators for today’s computationally intensive applications. These applications use advanced algorithms more sophisticated than ever before. The high design complexity along with fast development process challenges the traditional FPGA design methodology using hardware description languages. High-level synthesis accelerates design implementation by raising the level of design abstraction beyond register transfer level. This dissertation work develops a highly energy-efficient FPGA high-level synthesis tool, ArchSyn, using an application-specific coarse-grain architecture as an intermediate synthesis step. ArchSyn provides rapid and energy-efficient compilation of dataflow graphs (DFGs) on FPGAs by scheduling the dataflow operations on an array of directly connected simple configurable processing elements (CPEs). Each CPE in the array performs primitive compute operations according to a small local sequencer at each cycle. Data are communicated via multi-hop routing within the direct interconnect network. The scheduler schedules each compute operation of the DFG obtained from the high-level design to execute on a particular hardware CPE at a particular cycle. It also determines the communication schedule of the intermediate data among the producing and consuming CPEs, optionally buffering them with distributed memory along the path. As such, the lengthy process of synthesizing a full custom hardware design on FPGA is reduced to a scheduling and mapping process. By restricting the fine-grain programmability into a coarse grain processor network scheduling problem, the compilation time can be improved substantially, thereby improving the overall productivity of the designer. Furthermore, taking advantage of the programmability of FPGAs, the effect of the array interconnect architecture on the energy-efficiency of the resulting system is studied. By altering the array configuration, the data communication scheme among the CPEs must also be changed. This has a net effect on both the energy consumption spent on data movement as well as on the overall compute performance. It is shown that by using array topology that is customized to the input DFG, up to 28% improvement in energy-efficiency could be achieved. An exploratory framework based on a genetic algorithm was developed that allows us to obtain such application-specific connection network. Such degree of customization is possible only with the programmability of FPGAs. Moreover, such topology adaptation can be achieved rapidly as only routings between a fixed set of pre-placed CPEs are required. Implementations using ArchSyn and an existing FPGA compilation tool xPilot were compared. ArchSyn gave a 2X better energy consumption and a 11X better energy-delay product for computation with very regular and simple data dependency. For computation with irregular data dependency, the energy consumption and energy-delay product improvement was 9.6X and 199X.
published_or_final_version
Electrical and Electronic Engineering
Doctoral
Doctor of Philosophy

Gli stili APA, Harvard, Vancouver, ISO e altri

38

Hauck, Scott. "Multi-FPGA systems /". Thesis, Connect to this title online; UW restricted, 1995. http://hdl.handle.net/1773/7008.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

39

Johnson, Steven A. "Implementation of a configurable fault tolerant processor (CFTP)". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Mar%5FJohnson.pdf.

Testo completo

Abstract (sommario):

Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 2003.
Thesis advisor(s): Herschel H. Loomis, Alan A. Ross. Includes bibliographical references (p. 117). Also available online.

Gli stili APA, Harvard, Vancouver, ISO e altri

40

Han, Yi. "Development of nonlinear reconfigurable control of reconfigurable plants using the FPGA technology". Thesis, [S.l. : s.n.], 2008. http://dk.cput.ac.za/cgi/viewcontent.cgi?article=1011&context=td_cput.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

41

Schlottmann, Craig Richard. "Analog signal processing on a reconfigurable platform". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/29623.

Testo completo

Abstract (sommario):

Thesis (M. S.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2010.
Committee Chair: Hasler, Paul; Committee Member: Anderson, David; Committee Member: Ghovanloo, Maysam. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Gli stili APA, Harvard, Vancouver, ISO e altri

42

Mak, Wai-kei. "Partitioning and routing for multi-FPGA systems /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

43

Chang, Mark L. "Variable precision analysis for FPGA synthesis /". Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/5901.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

44

Kumar, Akhilesh. "Leakage Power Modeling and Reduction Techniques for Field Programmable Gate Arrays". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/766.

Testo completo

Abstract (sommario):

FPGAs have become quite popular for implementing digital circuits and systems because of reduced costs and fast design cycles. This has led to increased complexity of FPGAs, and with technology scaling, many new challenges have come up for the FPGA industry, leakage power being one of the key challenges. The current generation FPGAs are being implemented in 90nm technology, therefore, managing leakage power in deep-submicron FPGAs has become critical for the FPGA industry to remain competitive in the semiconductor market and to enter the mobile applications domain.

In this work an analytical state dependent leakage power model for FPGAs is developed, followed by dual-Vt based designs of the FPGA architecture for reducing leakage power.

The leakage power model computes subthreshold and gate leakage in FPGAs, since these are the two dominant components of total leakage power in the scaled nanometer technologies. The leakage power model takes into account the dependency of gate and subthreshold leakage on the state of the circuit inputs. The leakage power model has two main components, one which computes the probability of a state for a particular FPGA circuit element, and the other which computes the leakage of the FPGA circuit element for a given input using analytical equations. This FPGA power model is particularly important for rapidly analyzing various FPGA architectures across different technology nodes.

Dual-Vt based designs of the FPGA architecture are proposed, developed, and evaluated, for reducing the leakage power using a CAD framework. The logic and the routing resources of the FPGA are considered for dual-Vt assignment. The number of the logic elements that can be assigned high-Vt in the ideal case by using a dual-Vt assignment algorithm in the CAD framework is estimated. Based upon this estimate two kinds of architectures are developed and evaluated, homogeneous and heterogeneous architectures. Results indicate that leakage power savings of up to 50% can be obtained from these architectures. The analytical state dependent leakage power model developed has been used for estimating the leakage power savings from the dual-Vt FPGA architectures. The CAD framework that has been developed can also be used for developing and evaluating different dual-Vt FPGA architectures, other than the ones proposed in this work.

Gli stili APA, Harvard, Vancouver, ISO e altri

45

Wilton, Steven J. E. "Architectures and algorithms for field-programmable gate arrays with embedded memory". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ28082.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

46

Li, Wei. "Routability prediction for field programmable gate arrays with hierarchical interconnection structures". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ31846.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

47

Dai, Zhibin. "Routability prediction for Field Programmable Gate Arrays with a routing hierarchy". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56315.pdf.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

48

Lamoureux, Julien. "Modeling and reduction of dynamic power in field-programmable gate arrays". Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/414.

Testo completo

Abstract (sommario):

Field-Programmable Gate Arrays (FPGAs) are one of the most popular platforms for implementing digital circuits. Their main advantages include the ability to be (re)programmed in the field, a shorter time-to-market, and lower non-recurring engineering costs. This programmability, however, is afforded through a significant amount of additional circuitry, which makes FPGAs significantly slower and less power-efficient compared to Application Specific Integrated Circuits (ASICs). This thesis investigates three aspects of low-power FPGA design: switching activity estimation, switching activity minimization, and low-power FPGA clock network design. In our investigation of switching activity estimation, we compare new and existing techniques to determine which are most appropriate in the context of FPGAs. Specifically, we compare how each technique affects the accuracy of FPGA power models and the ability of power-aware CAD tools to minimize power. We then present a new publicly available activity estimation tool called ACE-2.0 that incorporates the most appropriate techniques. Using activities estimated byACE-2.0, power estimates and power savings were both within 1% of results obtained using simulated activities. Moreover, the new tool was 69 and 7.2 times faster than circuit simulation for combinational and sequential circuits, respectively. In our investigation of switching activity minimization, we propose a technique for reducing power in FPGAs by minimizing unnecessary transitions called glitches. The technique involves adding programmable delay elements at inputs of the logic elements of the FPGA to align the arrival times, thereby preventing new glitches from being generated. On average, the proposed technique eliminates 87% of the glitching, which reduces overall FPGA power by17%. The added circuitry increases the overall FPGA area by 6% and critical-path delay by less than 1%. Finally, in our investigation of low-power FPGA clock networks, we examine the tradeoff between the power consumption of FPGA clock networks and the cost of the constraints they impose on FPGA CAD tools. Specifically, we present a parameterized framework for describing FPGA clock networks, we describe new clock-aware placement techniques, and we perform an empirical study to examine how the clock network parameters affect the overall power consumption of FPGAs. The results show that the techniques used to produce a legal placement can have a significant influence on power and delay. On average, circuits placed using the most effective techniques dissipate 9.9% less energy and were 2.4% faster than circuits placed using the least effective techniques. Moreover, the results show that the architecture of the clock network is also important. On average, FPGAs with an efficient clock network were up to12.5% more energy efficient and 7.2% faster than other FPGAs.

Gli stili APA, Harvard, Vancouver, ISO e altri

49

Campregher, Nicola. "Interconnect yield analysis and fault tolerance for field programmable gate arrays". Thesis, Imperial College London, 2007. http://hdl.handle.net/10044/1/11966.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

50

Inuani, Maurice Kilavuka. "Technology mapping of heterogeneous lookup table based field programmable gate arrays". Thesis, University of Oxford, 1998. http://ora.ox.ac.uk/objects/uuid:8ec8745f-c0b2-43c0-994f-bd949d9fdefa.

Testo completo

Abstract (sommario):

A lot of work has been done over the last decade on the logic synthesis and technology mapping of field programmable gate arrays (FPGAs) based on a single size of lookup table (LUT). A significant part of the FPGA market is occupied by devices based on more than one type of lookup tables. Examples of these heterogeneous LUT-based FPGAs are the Xilinx 4000 series devices. The technology mapping for this class of FPGAs has hardly been considered. This thesis covers work on the synthesis for heterogeneous LUT-based FPGAs. The proposed scheme uses the typical steps of graph covering, decomposition, node elimination and Boolean graph simplification. The covering step is based on the concept of flow networks and cut-computation. A theory is devised that reduces the flow network sizes so that a dynamic programming approach can be used to compute the feasible cuts in the network. An iterative selection algorithm can then be used to compute the set cover of the network. For the decomposition, the conventional bin-packing (cube-packing) algorithm has been extended so that it produces two types of bins. It has also been enhanced to explore several packing possibilities and include cube division and cascading of nodes. The classical functional decomposition method is extended to heterogeneous graphs. In particular, variable partitioning is coupled with other decomposition methods and exploits the structure of the functions. Partial collapsing and re-decomposition are used to re-synthesise the graphs. A strategy for eliminating nodes within a heterogeneous graph is developed. A simplification strategy is also derived from logic optimisation techniques. Comparisons of the mapping results on Xilinx devices show an improvement of over 11% over existing mapping tools for the same devices.

Gli stili APA, Harvard, Vancouver, ISO e altri

Tesi sul tema "Field Programmable Gate Arrays"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili