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Auteur : Grafiati
Publié le 11 septembre 2023

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1

Arora, Tajinder Singh, et Udit Rana. « Multifunction Filter Employing Current Differencing Buffered Amplifier ». Circuits and Systems 07, no 05 (2016) : 543–50. http://dx.doi.org/10.4236/cs.2016.75046.

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2

Gupta, Priyanka, et Rajeshwari Pandey. « A low‐power voltage differencing buffered amplifier ». International Journal of Circuit Theory and Applications 47, no 9 (30 juillet 2019) : 1402–16. http://dx.doi.org/10.1002/cta.2668.

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3

Lahiri, Abhirup. « Comment on “Voltage-Mode All-Pass Filters Including Minimum Component Count Circuits” ». Active and Passive Electronic Components 2009 (2009) : 1–4. http://dx.doi.org/10.1155/2009/595324.

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This comment is related to the recently published article “Active and Passive Electronic Components” by S. Maheshwari (2007), which presents single current differencing buffered amplifier (CDBA) and current-controlled current differencing buffered amplifier- (CC-CDBA-) based first-order voltage-mode (VM) all-pass filtering (APF) sections. The paper is reviewed, and additional first-order APF realizations have been proposed.
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4

Maheshwari, Sudhanshu. « Voltage-Mode All-Pass Filters Including Minimum Component Count Circuits ». Active and Passive Electronic Components 2007 (2007) : 1–5. http://dx.doi.org/10.1155/2007/79159.

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This paper presents two new first-order voltage-mode all-pass filters using a single-current differencing buffered amplifier and four passive components. Each circuit is compatible to a current-controlled current differencing buffered amplifier with only two passive elements, thus resulting in two more circuits, which employ a capacitor, a resistor, and an active element, thus using a minimum of active and passive component counts. The proposed circuits possess low output impedance, and hence can be easily cascaded for voltage-mode systems. PSPICE simulation results are given to confirm the theory.
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5

Singroha, Vikas, Bhawna Aggarwal et Shireesh Kumar Rai. « Voltage Differencing Buffered Amplifier (VDBA) Based Grounded Meminductor Emulator ». International Journal of Electrical and Electronics Research 10, no 3 (30 septembre 2022) : 487–91. http://dx.doi.org/10.37391/ijeer.100314.

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A new meminductor emulator using a capacitor, a memristor and a voltage differencing buffered amplifier (VDBA) is proposed in this paper. This reported realization of meminductor is very simple than proposed in literature as it needs only 1 active block. The proposed emulator has been found suitable for low frequency operations with electrical tunability, and multiplier free topology. The characteristics of the proposed emulator have been verified for a frequency range of 1.8Hz to 4.9Hz using the LTspice simulation tool with 180nm CMOS technology parameters. Pinched hysteresis loops observed in flux versus current plane verifies its meminductive behavior. Moreover, the non-volatility test of the proposed emulator proves its memory behavior. The pinched hysteresis loops obtained through simulations show that the lobe area reduces with increase in frequency.
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6

Maheshwari, Sudhanshu, et Iqbal A. Khan. « Current Controlled Current Differencing Buffered Amplifier : Implementation and Applications ». Active and Passive Electronic Components 27, no 4 (2004) : 219–27. http://dx.doi.org/10.1080/08827510310001648924.

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A new four terminal current-controlled active element is introduced, where parasitic resistances at two current input ports are controlled leading to the definition of current-controlled current differencing buffered amplifier. Bipolar implementation and as application current-mode band-pass filter circuits are proposed. Simulation results using real device parameters are included, which show device bandwidth of 35 MHz, low total harmonic distortions, and tuning over a wide current range.
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7

Cakir, Cem, Shahram Minaei et Oguzhan Cicekoglu. « Low voltage low power CMOS current differencing buffered amplifier ». Analog Integrated Circuits and Signal Processing 62, no 2 (21 août 2009) : 237–44. http://dx.doi.org/10.1007/s10470-009-9350-6.

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8

Gupta, Priyanka, Kunal Gupta, Neeta Pandey et Rajeshwari Pandey. « CDBA based current instrumentation amplifier ». Journal of Communications Technology, Electronics and Computer Science 4 (16 février 2016) : 11. http://dx.doi.org/10.22385/jctecs.v4i0.62.

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This paper presents a novel method to realize a current mode instrumentation amplifier (CMIA) through CDBA (Current difference Buffered Amplifier). It employs two CDBAs and two resistors to obtain desired functionality. Further, it does not require any resistor matching. The gain can be set according to the resistor values. It offers high differential gain and a bandwidth, which is independent of gain. The working of the circuit is verified through PSPICE simulations using CFOA IC based CDBA realization.
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9

Nandi, R., S. Das, Mousiki Kar et Sagarika Das. « Active-R tunable integrators using a current differencing buffered amplifier ». International Journal of Electronics 97, no 2 (février 2010) : 129–37. http://dx.doi.org/10.1080/00207210903168835.

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10

Özcan, S., A. Toker, C. Acar, H. Kuntman et O. Çiçekoģlu. « Single resistance-controlled sinusoidal oscillators employing current differencing buffered amplifier ». Microelectronics Journal 31, no 3 (mars 2000) : 169–74. http://dx.doi.org/10.1016/s0026-2692(99)00113-5.

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11

Benko, Pedro Luiz, Milene Galeti, Cleiton Fidelix Pereira, Julio Cesar Lucchi et Renato Camargo Giacomini. « Bio-Amplifier based on MOS bipolar Pseudo-Resistors : A New Approach using its non-linear characteristic ». Journal of Integrated Circuits and Systems 11, no 2 (28 décembre 2016) : 132–39. http://dx.doi.org/10.29292/jics.v11i2.437.

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This paper proposes a new and refined bio-amplifier design, which associates DC offset cancellation, adequate frequency response and buffered outputs to a significant reduction of the signal recovery time. A MOS-Bipolar pseudo-resistor integrated to the feedback network of a single-stage Operational Transconductance Amplifier and the source-follower buffers give to the new topology its main advantages. This architecture makes use of the high resistance values of these pseudo-resistors to eliminate the offset DC level input preserving the low cut-off frequency, without the need of high capacitances, thereby significantly reducing the active die area, which enables its use as a front-end pre-amplifier assembled directly on the acquisition probes. The recovery time after an input voltage transitory of high-amplitude is an important characteristic of the bio-potential amplifiers due to their very low cut-off frequency. The proposed bio-amplifier utilizes the non-linear characteristics of the pseudo-resistor in the recovery time reduction. This time was evaluated and the topology presented a significant contribution in this aspect, assuming values 90% lower when compared with the same topology using a constant resistance. The new amplifier allows voltage gain of 30dB from 0.6 Hz to 2 kHz, and Total Harmonic Distortion (THD) of 0.19% for an input signal of 10Hz. This work also provides a behavioral spice model for MOS-Bipolar pseudo-resistor, which allows an accurate simulation of the linear and nonlinear pseudo-resistor characteristics, obtained through an experimental method of indirect characterization. This method is based on the transitory response from a first order RC low pass filter. The experimental characterization method is of fundamental importance, due to the absence of appropriate SPICE models that describe with precision the pseudo-resistance behavior. The circuits were manufactured by MOSIS on 8HP SiGe BiCmos Global Foundries 0.13μm technology.
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12

Dimas, Christos, Vassilis Alimisis, Ioannis Georgakopoulos, Nikolaos Voudoukis, Nikolaos Uzunoglu et Paul P. Sotiriadis. « Analysis, Simulation, and Development of a Low-Cost Fully Active-Electrode Bioimpedance Measurement Module ». Technologies 9, no 3 (9 août 2021) : 59. http://dx.doi.org/10.3390/technologies9030059.

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A low-cost 1 kHz–400 kHz operating frequency fully-active electrode bioimpedance measurement module, based on Howland current source, is presented in this paper. It includes a buffered positive feedback Howland current source, implemented with operational amplifiers, as well as an AD8421 instrumentation amplifier, for the differential voltage measurements. Each active electrode module can be connected to others, assembling a wearable active electrode module array. From this array, 2 electrodes can be selected to be driven from a THS413 fully differential amplifier, activating a mirrored Howland current source. This work performs a complete circuit analysis, verified with MATLAB and SPICE simulations of the current source’s transconductance and output impedance over the frequency range between 1 kHz and 1 MHz. Resistors’ tolerances, possible mismatches, and the operational amplifiers’ non-idealities are considered in both the analysis and simulations. A comparison study between four selected operational amplifiers (ADA4622, OPA2210, AD8034, and AD8672) is additionally performed. The module is also hardware-implemented and tested in the lab for all four operational amplifiers and the transconductance is measured for load resistors of 150 Ω, 660 Ω, and 1200 Ω. Measurements showed that, using the AD8034 operational amplifier, the current source’s transconductance remains constant for frequencies up to 400 KHz for a 150 Ω load and 250 kHz for a 1200 Ω load, while lower performance is achieved with the other 3 operational amplifiers. Finally, transient simulations and measurements are performed at the AD8421 output for bipolar measurements on the 3 aforementioned load resistor values.
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13

Paul, T. K., S. Roy et R. R. Pal. « Realization of Inverse Active Filters Using Single Current Differencing Buffered Amplifier ». Journal of Scientific Research 13, no 1 (1 janvier 2021) : 85–99. http://dx.doi.org/10.3329/jsr.v13i1.47766.

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The authors introduce a new single current differencing buffered amplifier (CDBA) based inverse filter configuration. By appropriate selection of admittances, different inverse filter circuits like inverse high-pass (IHP) circuit, inverse low-pass (ILP) circuit, inverse band-reject (IBR) circuit and inverse band-pass (IBP) circuit can be realized from the same configuration. The capacitors used here are grounded/virtually grounded for all the realizations. The performances of the proposed filters have been judged by using CMOS structure of CDBA with TSMC 0.35 µm technology as well as by using the available IC of current feedback operational amplifier (CFOA) i.e. AD844 based CDBA. The simulation results agreed well with the theoretical results. Monte-Carlo simulation has also been performed to check the robustness of the proposed configuration.
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14

Paul, T. K., S. Roy et R. R. Pal. « Realization of Inverse Active Filters Using Single Current Differencing Buffered Amplifier ». Journal of Scientific Research 13, no 1 (1 janvier 2021) : 85–99. http://dx.doi.org/10.3329/jsr.v13i1.47766.

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The authors introduce a new single current differencing buffered amplifier (CDBA) based inverse filter configuration. By appropriate selection of admittances, different inverse filter circuits like inverse high-pass (IHP) circuit, inverse low-pass (ILP) circuit, inverse band-reject (IBR) circuit and inverse band-pass (IBP) circuit can be realized from the same configuration. The capacitors used here are grounded/virtually grounded for all the realizations. The performances of the proposed filters have been judged by using CMOS structure of CDBA with TSMC 0.35 µm technology as well as by using the available IC of current feedback operational amplifier (CFOA) i.e. AD844 based CDBA. The simulation results agreed well with the theoretical results. Monte-Carlo simulation has also been performed to check the robustness of the proposed configuration.
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15

GULSOY, M. « Lossless and Lossy Synthetic Inductors Employing Single Current Differencing Buffered Amplifier ». IEICE Transactions on Communications E88-B, no 5 (1 mai 2005) : 2152–55. http://dx.doi.org/10.1093/ietcom/e88-b.5.2152.

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16

Tangsrirat, Worapong, Danucha Prasertsom et Wanlop Surakampontorn. « Low-voltage digitally controlled current differencing buffered amplifier and its application ». AEU - International Journal of Electronics and Communications 63, no 4 (avril 2009) : 249–58. http://dx.doi.org/10.1016/j.aeue.2008.01.006.

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17

Özcan, Sadri, Hakan Kuntman et O. uzhan Çiçekolu. « Cascadable Current Mode Multipurpose Filters Employing Current Differencing Buffered Amplifier (CDBA) ». AEU - International Journal of Electronics and Communications 56, no 2 (janvier 2002) : 67–72. http://dx.doi.org/10.1078/1434-8411-54100075.

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18

Giannelli, Pietro, Giacomo Calabrese, Giovanni Frattini, Maurizio Granato et Lorenzo Capineri. « A Buffered Single-Supply Charge Amplifier for High-Impedance Piezoelectric Sensors ». IEEE Transactions on Instrumentation and Measurement 68, no 2 (février 2019) : 368–76. http://dx.doi.org/10.1109/tim.2018.2849521.

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19

Biolek, Dalibor, Josef Bajer, Viera Biolková, Zdeněk Kolka et Michal Kubíček. « Z Copy-Controlled Gain-Current Differencing Buffered Amplifier and its applications ». International Journal of Circuit Theory and Applications 39, no 3 (mars 2011) : 257–74. http://dx.doi.org/10.1002/cta.632.

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20

Siriphuchyanun, Montree, Phamorn Silapan et Winai Jaikla. « Low-offset BiCMOS Current Controlled Current Differencing Buffered Amplifier (CC-CDBA) and Applications ». ECTI Transactions on Electrical Engineering, Electronics, and Communications 6, no 1 (1 août 2007) : 81–90. http://dx.doi.org/10.37936/ecti-eec.200861.171766.

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This article presents the design for a basic current mode building block for analog signal processing, called Current Controlled Current Differencing Buffered Amplifier (CC-CDBA). Its parasitic resistances at two current input ports can be controlled by an input bias current. The output current and voltage offset are quite low. The proposed element was realized in a BiCMOS technology and the voltage follower in the element is modified to achieve high performance properties. Its performances are examined through PSPICE simulations. In addition,examples as a current-mode multiplier/divider and current amplifier are included, compared to the conventional CC-CDBA implementation. They disclose performances of the proposed CC-CDBA superior to previous CC-CDBA.
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21

Pandey, Rajeshwari, Neeta Pandey, Tushar Negi et Vivek Garg. « CDBA Based Universal Inverse Filter ». ISRN Electronics 2013 (17 mars 2013) : 1–6. http://dx.doi.org/10.1155/2013/181869.

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Current difference buffered amplifier (CDBA) based universal inverse filter configuration is proposed. The topology can be used to synthesize inverse low-pass (ILP), inverse high-pass (IHP), inverse band-pass (IBP), inverse band-reject (IBR), and inverse all-pass filter functions with appropriate admittance choices. Workability of the proposed universal inverse filter configuration is demonstrated through PSPICE simulations for which CDBA is realized using current feedback operational amplifier (CFOA). The simulation results are found in close agreement with the theoretical results.
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22

Duangmalai, Danupat, et Peerawut Suwanjan. « The voltage-mode first order universal filter using single voltage differencing differential input buffered amplifier with electronic controllability ». International Journal of Electrical and Computer Engineering (IJECE) 12, no 2 (1 avril 2022) : 1308. http://dx.doi.org/10.11591/ijece.v12i2.pp1308-1323.

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In this research contribution, the electronically tunable first-order universal filter employing a single voltage differencing differential input buffered amplifier (VD-DIBA) (constructed from two commercially available integrated circuit (IC): the operational transconductance amplifier, IC number LT1228, and the differential voltage input buffer, IC number AD830), one capacitor and two resistors. The features of the designed first order universal filter are as follows. Three voltage-mode first-order functions, low-pass (LP), all-pass (AP) and high-pass (HP) responses are given. The natural frequency (𝜔0) of the presented configuration can be electronically adjusted by setting the DC bias current. Moreover, the voltage gain of the LP and HP filters can be controllable. The phase responses of an AP configuration can be varied from 00 to −1800 and 1800 to 00. The power supply voltages were set at ±5 𝑉. Verification of the theoretically described performances of the introduced electronically tunable universal filter was proved by the PSpice simulation and experiment.
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23

Yesil, Abdullah, et Firat Kacar. « Current and Voltage Mode Quadrature Oscillator Based on Voltage Differencing Buffered Amplifier ». Istanbul University - Journal of Electrical & ; Electronics Engineering 18, no 1 (2018) : 6–12. http://dx.doi.org/10.5152/iujeee.2018.1802.

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LAHIRI, ABHIRUP, et ANKUSH CHOWDHURY. « FOUR QUADRANT ANALOG MULTIPLIER USING DUAL-CURRENT-CONTROLLED CURRENT DIFFERENCING BUFFERED AMPLIFIER ». Journal of Circuits, Systems and Computers 20, no 02 (avril 2011) : 223–31. http://dx.doi.org/10.1142/s0218126611007219.

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A novel four quadrant analog multiplier (FQAM) is presented using the recently proposed active building block (ABB), namely the dual-current-controlled current differencing buffered amplifier (DCC-CDBA). The inputs to the circuit are two bipolar current signals and current and voltage outputs are available as multiplication of the input signals. The use of DCC-CDBA in four quadrant multiplier design is attractive, since the circuit structure is very simple and uses reduced number of components, viz. only one DCC-CDBA, which is constructed using two second-generation current controlled conveyors (CCCIIs). The circuit operation is current-tunable and ideally temperature insensitive. The workability of the circuit is verified using PSPICE simulations.
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25

Tangsrirat, W., et O. Channumsin. « Tunable Floating Capacitance Multiplier Using Single Fully Balanced Voltage Differencing Buffered Amplifier ». Journal of Communications Technology and Electronics 64, no 8 (août 2019) : 797–803. http://dx.doi.org/10.1134/s1064226919080163.

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Biolek, Dalibor, Josef Bajer, Viera Biolková, Zdeněk Kolka et Michal Kubíček. « Erratum : Z Copy-Controlled Gain-Current Differencing Buffered Amplifier and its applications ». International Journal of Circuit Theory and Applications 39, no 4 (avril 2011) : 437–38. http://dx.doi.org/10.1002/cta.778.

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27

Bashir, Sheikh Ajaz, et Nisar Ahmed Shah. « Voltage Mode Universal Filter Using Current Differencing Buffered Amplifier as an Active Device ». Circuits and Systems 03, no 03 (2012) : 278–81. http://dx.doi.org/10.4236/cs.2012.33038.

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Pushkar, Kanhaiya Lal, Data Ram Bhaskar et Dinesh Prasad. « Voltage-Mode Universal Biquad Filter Employing Single Voltage Differencing Differential Input Buffered Amplifier ». Circuits and Systems 04, no 01 (2013) : 44–48. http://dx.doi.org/10.4236/cs.2013.41008.

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LI, YongAn. « Behavior Models of Voltage Differencing Inverting Buffered Amplifier and Applications in Circuit Analysis ». Recent Advances in Electrical & ; Electronic Engineering (Formerly Recent Patents on Electrical & ; Electronic Engineering) 12, no 4 (23 août 2019) : 298–303. http://dx.doi.org/10.2174/2352096511666180629151111.

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Background: The symbolic nodal analysis acts as a pivotal part of the very large scale integration (VLSI) design. Methods: In this work, based on the terminal relations for the pathological elements and the voltage differencing inverting buffered amplifier (VDIBA), twelve alternative pathological models for the VDIBA are presented. Moreover, the proposed models are applied to the VDIBA-based second-order filter and oscillator so as to simplify the circuit analysis. Results: The result shows that the behavioral models for the VDIBA are systematic, effective and powerful in the symbolic nodal circuit analysis.</P>
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Herencsar, Norbert, Kamil Vrba, Jaroslav Koton et Ivo Lattenberg. « The conception of differential-input buffered and transconductance amplifier (DBTA) and its application ». IEICE Electronics Express 6, no 6 (2009) : 329–34. http://dx.doi.org/10.1587/elex.6.329.

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Maheswari, Kankanampati, Avireni Srinivasulu et Cristian Ravariu. « Z-Copy Current Differencing Buffered Amplifier based Schmitt trigger circuit without passive components ». Solid State Electronics Letters 1, no 2 (juillet 2019) : 140–46. http://dx.doi.org/10.1016/j.ssel.2019.11.003.

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METIN, BILGIN, et KIRAT PAL. « NEW ALL-PASS FILTER CIRCUIT COMPENSATING FOR C-CDBA NON-IDEALITIES ». Journal of Circuits, Systems and Computers 19, no 02 (avril 2010) : 381–91. http://dx.doi.org/10.1142/s0218126610006128.

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In this paper, a CMOS current controlled current differencing buffered amplifier (C-CDBA) realization is presented. Also, a new first-order all-pass filter that compensates for some C-CDBA non-idealities is given as an application example. The all-pass filter circuit has low output impedance for easy cascadability and it can be made electronically tunable using the proposed C-CDBA implementation. The theoretical results are verified with SPICE simulations.
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Faseehuddin, Mohammad, Norbert Herencsar, Sadia Shireen, Worapong Tangsrirat et Sawal Hamid Md Ali. « Voltage Differencing Buffered Amplifier-Based Novel Truly Mixed-Mode Biquadratic Universal Filter with Versatile Input/Output Features ». Applied Sciences 12, no 3 (25 janvier 2022) : 1229. http://dx.doi.org/10.3390/app12031229.

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In this paper, a first-of-a-kind mixed-mode universal filter employing three VDBAs and three passive components, is proposed. The filter operates in all four modes and provides all five filter responses, namely voltage-mode (VM), current-mode (CM), trans-impedance-mode (TIM), or trans-admittance-mode (TAM). Additionally, the same filter topology can also work as a CM single-input-multi-output (SIMO) filter. A state-of-the-art comparison of various ‘voltage differencing’ variants of the voltage differencing buffered amplifier (VDBA)-based SIMO/MISO (single-input-multi-output/multi-input-single-output)-type biquad filters further highlight the significance of the presented research. In the proposed no passive component matching is required for generating the filter responses. The filter circuit also provides inbuilt tunability of the quality factor independent of the pole frequency. The non-ideal frequency dependent gain and component sensitivity analyses of the filter were also performed. The Silterra Malaysia 0.18μm process design kit (PDK) is employed to design and validated the proposed VDBA-based filter using the Cadence design software. The simulation results closely follow the theoretical predictions. To further verify the practical feasibility of the proposed filter, an experimental evaluation is also completed. The VDBA-based filter is implemented using off-the-shelf operational transconductance amplifiers Intersil CA3080, Texas Instruments LF356 op-amp, and Analog Devices AD844s. The filter is designed for a characteristic frequency of 100 kHz. The time and frequency domain measurement results indicate the proper functioning of the filter.
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Acar, Cevdet, et Serdar Ozoguz. « A new versatile building block : current differencing buffered amplifier suitable for analog signal-processing filters ». Microelectronics Journal 30, no 2 (février 1999) : 157–60. http://dx.doi.org/10.1016/s0026-2692(98)00102-5.

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Acar, C., et S. Özoǧuz. « nth-order current transfer function synthesis using current differencing buffered amplifier : signal-flow graph approach ». Microelectronics Journal 31, no 1 (janvier 2000) : 49–53. http://dx.doi.org/10.1016/s0026-2692(99)00088-9.

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Khateb, Fabian, Firat Kaçar, Nabhan Khatib et David Kubánek. « High-Precision Differential-Input Buffered and External Transconductance Amplifier for Low-Voltage Low-Power Applications ». Circuits, Systems, and Signal Processing 32, no 2 (21 août 2012) : 453–76. http://dx.doi.org/10.1007/s00034-012-9470-6.

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Kumari, Shweta, et Maneesha Gupta. « New CMOS realization of high performance Voltage Differencing Inverting Buffered Amplifier and its filter application ». Analog Integrated Circuits and Signal Processing 92, no 1 (12 avril 2017) : 167–78. http://dx.doi.org/10.1007/s10470-017-0968-5.

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Danupat Duangmalai, Thosapol Manasri, Adisorn Kwawsibsam et Winai Jaikla. « Electronically Tunable Voltage-Mode Multiphase Sinusoidal Oscillator with Low Output Impedance Nodes Employing VD-DIBAs ». International Journal of Engineering and Technology Innovation 13, no 2 (1 avril 2023) : 137–49. http://dx.doi.org/10.46604/ijeti.2023.10461.

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The multiphase sinusoidal oscillator (MSO) is useful for various electrical and electronic applications. This study aims to design an MSO employing voltage differencing differential input buffered amplifiers (VD-DIBAs). The design procedure is based on cascading the first-order low-pass filter. Each phase consists of a VD-DIBA, two resistors, and a grounded capacitor. An odd-phase system without requiring an additional amplifier. The frequency is electronically controlled through the bias current without affecting the condition. The sinewave amplitudes and the phase difference between each waveform are identical. The proposed MSO is designed to obtain three-phase waveforms (n = 3). PSPICE simulation demonstrates the performance of the proposed oscillator with 0.18 μm TSMC CMOS parameters with ±0.9 V power supply. The feasibility of the proposed MSO is also verified with experiments using the VD-DIBA constructed from commercial integrated circuits (ICs) with a ±5 V power supply. The simulated and experimental results align with theoretical predictions.
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Pushkar, K. L., D. R. Bhaskar et Dinesh Prasad. « Single-Resistance-Controlled Sinusoidal Oscillator Using Single VD-DIBA ». Active and Passive Electronic Components 2013 (2013) : 1–5. http://dx.doi.org/10.1155/2013/971936.

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This paper presents a new single-resistance-controlled sinusoidal oscillator (SRCO). The proposed oscillator employs only one voltage differencing differential input buffered amplifier (VD-DIBA), two resistors, and two grounded capacitors. The proposed configuration offers the following advantageous features: (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, and (iii) a very good frequency stability. The validity of the proposed SRCO has been established by SPICE simulations using 0.35 μm MIETEC technology.
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40

Pandey, Rajeshwari, Neeta Pandey, Sajal K. Paul, Kashish Anand et Kranti Ghosh Gautam. « Voltage Mode Astable Multivibrator Using Single CDBA ». ISRN Electronics 2013 (7 avril 2013) : 1–8. http://dx.doi.org/10.1155/2013/390160.

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This paper aims at presenting three voltage mode square wave generator circuits using single current differencing buffered amplifier (CDBA), a recently proposed mixed mode building block. The first proposed circuit produces a variable frequency output having fixed duty cycle, whereas the rest of the circuits have variable duty cycle. One of the circuits uses passive element adjustment to control the duty cycle, whereas electronic control is used in the other circuit. The workability of the proposed circuits is confirmed through SPICE simulations and experimental work.
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41

Nandi, R., Mousiki Kar et Sagarika Das. « Electronically Tunable Dual-Input Integrator Employing a Single CDBA and a Multiplier : Voltage Controlled Quadrature Oscillator Design ». Active and Passive Electronic Components 2009 (2009) : 1–5. http://dx.doi.org/10.1155/2009/835789.

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A new dual-input differential input active integrator using a current differencing buffered amplifier (CDBA) is proposed. A multiplier element is appropriately used in the circuit whose control voltage (Vc) tunes the integrator time constant (τ) electronically. The design of a voltage controlled quadrature oscillator (VCQO) based on the proposed integrator had been satisfactorily implemented. A new type of measurement for the tuning error of the oscillator based on the Nyquist plot is presented that shows an error of only 2% atfo≈1 MHz with Total Harmonic Distortion (THD) less than 3%.
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42

Roongmuanpha, Natchanai, Mohammad Faseehuddin, Norbert Herencsar et Worapong Tangsrirat. « Tunable Mixed-Mode Voltage Differencing Buffered Amplifier-Based Universal Filter with Independently High-Q Factor Controllability ». Applied Sciences 11, no 20 (15 octobre 2021) : 9606. http://dx.doi.org/10.3390/app11209606.

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This paper proposes the design of a mixed-mode universal biquad configuration, which realizes generic filter functions in all four possible modes, namely voltage mode (VM), current mode (CM), transadmittance mode (TAM), and transimpedance mode (TIM). The filter architecture employs two voltage differencing buffered amplifiers (VDBAs), two resistors and two capacitors, and can provide lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS), and allpass (AP) biquadratic filtering responses without any circuit alteration. All passive elements used are grounded, except VM. The circuit not only allows for the electronic tuning of the natural angular frequency (ωo), but also achieves orthogonal tunability of the quality factor (Q). It also provides the feature of availability of output voltage at the low-output impedance terminal in VM and TIM, and does not require inverting-type or double-type input signals to realize all the responses. Moreover, in all modes of operation, the high-Q filter can be easily obtained by adjusting a single resistance value. Influences of the VDBA nonidealities and parasitic elements are also discussed in detail. PSPICE simulations with TSMC 0.18-µm CMOS process parameters and experimental testing results with commercially available IC LT1228s have been used to validate the theoretical predictions.
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43

Tangsrirat, W., K. Klahan, T. Dumawipata et W. Surakampontorn. « Low-voltage NMOS-based current differencing buffered amplifier and its application to current-mode ladder filter design ». International Journal of Electronics 93, no 11 (novembre 2006) : 777–91. http://dx.doi.org/10.1080/00207210600711556.

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Mamatov, Islombek, Yasin Özçelep et Fırat Kaçar. « Voltage differencing buffered amplifier based low power, high frequency and universal filters using 32 nm CNTFET technology ». Microelectronics Journal 107 (janvier 2021) : 104948. http://dx.doi.org/10.1016/j.mejo.2020.104948.

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45

Toker, A., S. Ozoguz, O. Cicekoglu et C. Acar. « Current-mode all-pass filters using current differencing buffered amplifier and a new high-Q bandpass filter configuration ». IEEE Transactions on Circuits and Systems II : Analog and Digital Signal Processing 47, no 9 (2000) : 949–54. http://dx.doi.org/10.1109/82.868465.

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Srivastava, Richa, Om Krishna Gupta, Anup Kumar et Devesh Singh. « Low-voltage bulk-driven self-cascode transistor based voltage differencing inverting buffered amplifier and its application as universal filter ». Microelectronics Journal 102 (août 2020) : 104828. http://dx.doi.org/10.1016/j.mejo.2020.104828.

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47

Kumari, Shweta, et Maneesha Gupta. « Design and Analysis of Tunable Voltage Differencing Inverting Buffered Amplifier (VDIBA) with Enhanced Performance and Its Application in Filters ». Wireless Personal Communications 100, no 3 (2 février 2018) : 877–94. http://dx.doi.org/10.1007/s11277-018-5355-8.

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48

Borel, Andžej. « DEVELOPMENT AND INVESTIGATION OF INPUT AMPLIFIER FOR THE OSCILOSCOPE ». Mokslas - Lietuvos ateitis 12 (20 janvier 2020) : 1–5. http://dx.doi.org/10.3846/mla.2020.11420.

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Digital oscilloscope’s structure has analog signal acquisition circuit, which transforms signal’s amplitude to fit ADC dynamic range. This circuit is commonly called oscilloscope’s vertical or front-end amplifier. Difficulty in designing front-end amplifiers in GHz range largely affects higher frequency range oscilloscope’s price. This work is focused on designing a front-end amplifier using discrete and openly sold components. We propose a design for attenuator, buffer, variable gain circuits. Amplifier’s prototype is designed. Main characteristics of the amplifier were measured. Measured bandwidth is 3 GHz. Amplifier’s gain and attenuation can support vertical scale sensitivity range from 10 mV/div to 1 V/div. Step response distortion is under 10 %. SMD and PTH relay model attenuators were evaluated. In this paper we review oscilloscope’s front-end purpose and structure. We review amplifiers design and provide the results of experimental measurements.
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FANG, RAN, WENGAO LU, GUANNAN WANG, TINGTING TAO, YACONG ZHANG, ZHONGJIAN CHEN et DUNSHAN YU. « A LOW-NOISE HIGH-VOLTAGE INTERFACE CIRCUIT FOR CAPACITIVE MEMS GYROSCOPE ». Journal of Circuits, Systems and Computers 22, no 09 (octobre 2013) : 1340019. http://dx.doi.org/10.1142/s0218126613400197.

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This paper presents a high-voltage control and readout interface circuit implemented for capacitive Micro-Electro-Mechanic System (MEMS) gyroscope. A charge sensitive amplifier (CSA) with chopper technique is used to accomplish low-noise capacitive sensing. The stabilization of the closed drive loop is maintained by an auto gain controller (AGC) and an adjustable phase shifter. The outputs of the ASIC directly drive the gyroscope after buffered by an on-chip high-voltage level shifter. The chip is fabricated in a 0.35 um 5 V/12 V Bipolar, CMOS and DMOS (BCD) process. The test of the chip is performed with a MEMS vibratory gyroscope. The result shows that the Application Specific Integrated Circuit (ASIC) can ensure a stable oscillation in the drive axis, and the noise floor is 0.0015°/s/√Hz within 100 Hz.
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Ide, Kaoru, et Susumu Takahashi. « A Review of Neurologgers for Extracellular Recording of Neuronal Activity in the Brain of Freely Behaving Wild Animals ». Micromachines 13, no 9 (16 septembre 2022) : 1529. http://dx.doi.org/10.3390/mi13091529.

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Simultaneous monitoring of animal behavior and neuronal activity in the brain enables us to examine the neural underpinnings of behaviors. Conventionally, the neural activity data are buffered, amplified, multiplexed, and then converted from analog to digital in the head-stage amplifier, following which they are transferred to a storage server via a cable. Such tethered recording systems, intended for indoor use, hamper the free movement of animals in three-dimensional (3D) space as well as in large spaces or underwater, making it difficult to target wild animals active under natural conditions; it also presents challenges in realizing its applications to humans, such as the Brain–Machine Interfaces (BMI). Recent advances in micromachine technology have established a wireless logging device called a neurologger, which directly stores neural activity on ultra-compact memory media. The advent of the neurologger has triggered the examination of the neural correlates of 3D flight, underwater swimming of wild animals, and translocation experiments in the wild. Examples of the use of neurologgers will provide an insight into understanding the neural underpinnings of behaviors in the natural environment and contribute to the practical application of BMI. Here we outline the monitoring of the neural underpinnings of flying and swimming behaviors using neurologgers. We then focus on neuroethological findings and end by discussing their future perspectives.
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