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Articoli di riviste sul tema "CURRENT MODE AMPLIFIER"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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1

Chen, Yuening, Kecheng Wang e Yan Zhuang. "Current state and challenges of ECG amplifiers". Highlights in Science, Engineering and Technology 32 (12 febbraio 2023): 177–85. http://dx.doi.org/10.54097/hset.v32i.4988.

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This paper describes and compares three amplifiers for ECG recording, namely a four-transistor stage band-pass amplifier, a DDA-based fully differential CMOS instrumentation amplifier and an OTA amplifier using current reuse. The performance metrics of the three amplifiers are listed, their respective advantages are compared, what factors limit their disadvantages are analyzed, the current state of the art and the direction of development of the ECG amplifier are indicated, and suggestions are given for further enhancement of the ECG amp. These amplifier circuits are designed in 0.35 µm CMOS and are verified by layout followed by simulation simulations. The results show that running at 2V dc supply, the quad-transistor stage amplifier and the DDA fully differential amplifier consume 672nW, obtain at least 2uVrms of input reference noise, and obtain greater common mode rejection ratios of 86dB and 83dB, while the OTA amplifier consumes less 320nW, obtains the most 2.05uVrms of input reference noise, and obtains a smaller common-mode rejection ratio of 65dB.

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2

Li, Zhi Li, Kai Zhang e Xing Jian Dai. "Research on the Performance of 3-State Power Amplifiers for Magnetic Bearings". Applied Mechanics and Materials 389 (agosto 2013): 245–50. http://dx.doi.org/10.4028/www.scientific.net/amm.389.245.

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The performance of the power amplifier is closely related to their hardware components and current control modes. The work was focused on comparison of the experimental results based on different current sensors and the application of two different current control modes for 3-state amplifiers. When the same control mode was used, three kind of current sensors were tested and the corresponding amplifier current ripples were measured. Experimental results shown that when using a faster current sensor, the amplifier achieved smaller current ripples. Then a 3-state PWM current control mode and a Sample-Hold current control mode were compared based on the power amplifier circuit with the same hardware components. The performance difference in the experiments were studied and explained. The 3-state PWM power amplifier could achieve a better performance in actual use.

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3

Panagiotopoulos, D. A., R. W. Newcomb e S. K. Singh. "A current-mode exponential amplifier". IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing 47, n. 6 (giugno 2000): 548–52. http://dx.doi.org/10.1109/82.847071.

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4

Toumazou, C., e F. J. Lidgey. "Novel current-mode instrumentation amplifier". Electronics Letters 25, n. 3 (1989): 228. http://dx.doi.org/10.1049/el:19890163.

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5

Agrawal, Deepak, e Sudhanshu Maheshwari. "Cascadable current mode instrumentation amplifier". AEU - International Journal of Electronics and Communications 94 (settembre 2018): 91–101. http://dx.doi.org/10.1016/j.aeue.2018.06.038.

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6

TAMMAM, AMR ABDALLAH, MOHAMED BEN-ESMAEL e MOHAMMED R. ABAZAB. "CURRENT FEEDBACK OP-AMP UTILIZES NEW CURRENT CELL TO ENHANCE THE CMRR". Journal of Circuits, Systems and Computers 21, n. 05 (agosto 2012): 1250038. http://dx.doi.org/10.1142/s0218126612500387.

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Despite excellent high frequency and high speed performance, current-feedback operational amplifiers (CFOAs) generally exhibit poor common-mode rejection (CMRR) properties, which limit their utility [Analogue IC design: The current–mode approach, IEE Circuits and Systems Series, Peter peregrinus, 1990]. A novel current feedback operational amplifier (CFOA) with improved performance is presented. The proposed CFOA has a new current-cell [Novel current-feedback operational amplifier Design Based on a floating circuit technique, IEE Colloquium on Analogue Signal Processing, 1998], to bias the entire circuit, which achieves an incremental output resistance twice that of the well-known "Wilson" circuit. Simulation results of this new CFOA architecture indicate that the amplifier exhibits performance characteristics superior to those obtained with an established input architecture: in particular, the CMRR (common-mode rejection ratio) is 91 dB, and the d.c. offset voltage less than 26 μV.

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7

Watkins, G. T. "High bandwidth current mode amplifier for envelope modulated RF amplifiers". Electronics Letters 46, n. 13 (2010): 894. http://dx.doi.org/10.1049/el.2010.1376.

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8

Das, Rupam, e Sajal K. Paul. "Current mode instrumentation amplifier with CDCCC". Analog Integrated Circuits and Signal Processing 108, n. 2 (3 giugno 2021): 455–68. http://dx.doi.org/10.1007/s10470-021-01890-3.

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9

Alowersson, J., e P. Andersson. "622 MHz current-mode sense amplifier". Electronics Letters 32, n. 3 (1996): 154. http://dx.doi.org/10.1049/el:19960114.

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10

Kaulberg, T. "A CMOS current-mode operational amplifier". IEEE Journal of Solid-State Circuits 28, n. 7 (luglio 1993): 849–52. http://dx.doi.org/10.1109/4.222187.

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11

Lahiji, G. R., e A. M. Sodagar. "High-speed current-mode sense amplifier". Electronics Letters 30, n. 17 (18 agosto 1994): 1371–72. http://dx.doi.org/10.1049/el:19940946.

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12

Bruun, E. "Constant-bandwidth current mode operational amplifier". Electronics Letters 27, n. 18 (1991): 1673. http://dx.doi.org/10.1049/el:19911045.

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13

Gift, S. J. G. "An enhanced current-mode instrumentation amplifier". IEEE Transactions on Instrumentation and Measurement 50, n. 1 (2001): 85–88. http://dx.doi.org/10.1109/19.903882.

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14

Ramella, Chiara, Paolo Colantonio e Marco Pirola. "A Comprehensive Harmonic Analysis of Current-Mode Power Amplifiers". Energies 14, n. 21 (28 ottobre 2021): 7042. http://dx.doi.org/10.3390/en14217042.

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This work presents a comprehensive theoretical analysis of current-mode power amplifiers as a function of input power for different biasing classes under the common simplifying assumption of constant transconductance and hard current cut-off/saturation. Typically, the theoretical analysis of power amplifier performance and behavior are carried out only at maximum output power. However, to achieve high data-rates, modern telecommunication systems adopt signals characterized by a very high peak-to-average power ratio, thus it is useful to analyze the power amplifier behavior as a function of power back-off. Moreover, in many cases, to enhance the efficiency and/or to apply harmonic shaping techniques, a clipped drain-source current, which approaches a square wave, is required. The classical analysis can be extended to low power levels only under the assumption of power-independent conduction angle, which is true only for class-A and class-B amplifiers, and does not take into account possible waveform clipping at maximum current. This work presents a complete theoretical Fourier analysis of FET-based power amplifiers as a function of quiescent drain-source current at any input power level and accounting for the clipped current case, up to the square-wave limit, reorganizing and completing the material that can be found in classical textbooks in the field.

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15

Serebryakova, Elena, Kurt Blau e Matthias Hein. "Influence of the reconstruction filter on the performance of a switched-mode power amplifier". Facta universitatis - series: Electronics and Energetics 26, n. 1 (2013): 1–10. http://dx.doi.org/10.2298/fuee1301001s.

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This paper presents an analysis of a reconstruction filter in a switched mode power amplifier system. Doubly and singly terminated filters for current-mode class-S power amplifiers were analyzed previously through analytical, numerical, and experimental approaches, and it was shown that only singly terminated filters can fulfill the requirements of current-mode switching amplifiers, owing to their constant input resistance over the pass-band. In this paper potential effects of the parasitic components in the actual filters and the filter termination are evaluated. The simulation and measurement results of current mode class-S power amplifier systems employing GaN HEMT MMICs are presented and critically analyzed.

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16

YUCE, ERKAN. "VARIOUS CURRENT-MODE AND VOLTAGE-MODE INSTRUMENTATION AMPLIFIER TOPOLOGIES SUITABLE FOR INTEGRATION". Journal of Circuits, Systems and Computers 19, n. 03 (maggio 2010): 689–99. http://dx.doi.org/10.1142/s0218126610006372.

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In this paper, four instrumentation amplifier (IA) topologies, one of which is current-mode (CM) while the others are voltage-mode (VM), are presented. Three of the IAs use one to two current feedback operational amplifiers (CFOAs) while the other one employs only a single NMOS transistor. One of the IA circuits, given as an example, is simple while others are novel. The CM IA is composed of only grounded resistors which have some advantages in integrated circuit (IC) process. Non-ideality effects such as non-ideal gain and parasitic impedances on the performance of introduced IAs are discussed. In order to show the performance of the circuits, we perform experimental tests and simulations by using SPICE program.

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17

Gift, S. J. G., B. Maundy e F. Muddeen. "High-performance current-mode instrumentation amplifier circuit". International Journal of Electronics 94, n. 11 (novembre 2007): 1015–24. http://dx.doi.org/10.1080/00207210701751188.

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18

Tiwari, Nitendra kumar. "Low Power Reduction Techniques Implementation and Analysis in Sense Amplifier Circuit Configurations". Journal of Futuristic Sciences and Applications 5, n. 2 (2022): 31–37. http://dx.doi.org/10.51976/jfsa.522205.

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MTCMOS (Multi-Threshold CMOS), sleepy stack, sleepy keeper, and footer stack are examples of low power saving techniques incorporated into the core gpdk 90nm technology papers used in the proposed study using Cadence. The main focus of these tests is the power consumption of various sense amplifier circuits. The simulation results show that the charge-transfer sense amplifier uses much less energy than voltage and current sense amplifiers. The present mode detecting amplifier’s power consumption can be decreased by up to 98 percent by using MTCMOS technology.

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19

Singh, Apurva. "Novel CMOS Current Follower Transconductance Amplifier Current-Mode universal Filter". International Journal of Computer Applications 179, n. 15 (17 gennaio 2018): 34–40. http://dx.doi.org/10.5120/ijca2018916146.

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20

HOU, CHUN-LI, CHIEN-CHIH HUANG, YU-SHI LAN, JENG-JER SHAW e CHUN-MING CHANG. "Current-mode and voltage-mode universal biquads using a single current-feedback amplifier". International Journal of Electronics 86, n. 8 (agosto 1999): 929–32. http://dx.doi.org/10.1080/002072199132923.

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21

Gupta, Priyanka, Kunal Gupta, Neeta Pandey e Rajeshwari Pandey. "CDBA based current instrumentation amplifier". Journal of Communications Technology, Electronics and Computer Science 4 (16 febbraio 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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22

JIA Hua-yu, 贾华宇, 刘丽 LIU Li e 张建国 ZHANG Jian-guo. "Wide band current-mode amplifier for pipelined ADC". Optics and Precision Engineering 22, n. 10 (2014): 2855–60. http://dx.doi.org/10.3788/ope.20142210.2855.

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23

Nastro, Alessandro, Andrea De Marcellis, Marco Ferrari e Vittorio Ferrari. "A Current-Mode TransImpedance Amplifier for Capacitive Sensors". Proceedings 2, n. 13 (13 novembre 2018): 1033. http://dx.doi.org/10.3390/proceedings2131033.

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A Current-Mode (CM) TransImpedance Amplifier (TIA) based on Second Generation Current Conveyors (CCIIs) for capacitive microsensor measurements is presented. The designed electronic interface performs a capacitance-to-voltage conversion using 3 CCIIs and 3 resistors exploiting a synchronous-demodulation technique to improve the overall detection sensitivity and resolution of the system. A CM-TIA solution designed at transistor level in AMS0.35 µm integrated CMOS technology with a power consumption lower than 900 µW is proposed. Experimental results obtained with a board-level prototype show linear behavior of the proposed interface circuit with a resolution up to 34.5 fF and a sensitivity up to 223 mV/nF, confirming the theoretical expectations.

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24

Chang, C. C., M. L. Lin e S. I. Liu. "CMOS current-mode exponential-control variable-gain amplifier". Electronics Letters 37, n. 14 (2001): 868. http://dx.doi.org/10.1049/el:20010593.

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25

Azhari, S. J., e H. Fazlalipoor. "A novel current mode instrumentation amplifier (CMIA) topology". IEEE Transactions on Instrumentation and Measurement 49, n. 6 (2000): 1272–77. http://dx.doi.org/10.1109/19.893269.

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26

Oruganti, Sirish, Neeta Pandey e Rajeshwari Pandey. "Electronically tunable high gain current-mode instrumentation amplifier". AEU - International Journal of Electronics and Communications 95 (ottobre 2018): 16–23. http://dx.doi.org/10.1016/j.aeue.2018.07.035.

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27

Langhammer, Lukas, Roman Sotner, Jan Dvorak e Tomas Dostal. "Dual-Mode Multifunctional Reconnection-Less Reconfigurable Filter". Elektronika ir Elektrotechnika 26, n. 3 (26 giugno 2020): 36–41. http://dx.doi.org/10.5755/j01.eie.26.3.25856.

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A novel solution of a reconnection-less reconfigurable filter is being presented. The filter works in the current mode, voltage mode, and mixed mode (voltage tocurrent) offering sixteen transfer functions in total. The structure utilizes a voltage differencing transconductance amplifier, current follower and voltage, and current amplifiers. The designed structure offers the control of the pole frequency and quality factor and the adjustment of the band-stop/band-pass area of available functions. The proposed design is supported by the PSpice simulations using available simulation models.

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28

Walde, Dr Nisha, e Mr Prashant Kumar Mavi. "Novel Multifunction Filter using Current Feedback Amplifier". Transactions on Networks and Communications 9, n. 1 (1 marzo 2021): 18–21. http://dx.doi.org/10.14738/tnc.91.8122.

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One configuration for realizing voltage- mode multifunction filters using current feedback amplifiers (CFOA) is presented. The proposed voltage -mode circuit exhibit simultaneously low pass and band pass filters. The proposed circuits offer the following features: No requirements for component matching conditions; low active and passive sensitivities; employing only grounded capacitors and the ability to obtain multifunction filters from the same circuit configuration.

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29

WILSON, B. "Tutorial review Trends in current conveyor and current-mode amplifier design". International Journal of Electronics 73, n. 3 (settembre 1992): 573–83. http://dx.doi.org/10.1080/00207219208925692.

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30

Ara, Mahdi Behesht, e Seyed Javad Azhari. "A Low-Voltage Fully Differential Pure Current Mode Current Operational Amplifier". Circuits, Systems, and Signal Processing 35, n. 7 (12 settembre 2015): 2626–39. http://dx.doi.org/10.1007/s00034-015-0160-z.

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31

Kilinç, Selçuk, e Uğur Çam. "Current-Mode First-Order Allpass Filter Employing Single Current Operational Amplifier". Analog Integrated Circuits and Signal Processing 41, n. 1 (ottobre 2004): 47–53. http://dx.doi.org/10.1023/b:alog.0000038282.60137.5f.

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32

Özcan, Sadri, Hakan Kuntman e O. uzhan Çiçekolu. "Cascadable Current Mode Multipurpose Filters Employing Current Differencing Buffered Amplifier (CDBA)". AEU - International Journal of Electronics and Communications 56, n. 2 (gennaio 2002): 67–72. http://dx.doi.org/10.1078/1434-8411-54100075.

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33

Lahiri, Abhirup. "Novel voltage/current-mode quadrature oscillator using current differencing transconductance amplifier". Analog Integrated Circuits and Signal Processing 61, n. 2 (12 marzo 2009): 199–203. http://dx.doi.org/10.1007/s10470-009-9291-0.

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34

KONG, ZHI-HUI, KIAT-SENG YEO e CHIP-HONG CHANG. "AN ULTRA LOW-POWER CURRENT-MODE SENSE AMPLIFIER FOR SRAM APPLICATIONS". Journal of Circuits, Systems and Computers 14, n. 05 (ottobre 2005): 939–51. http://dx.doi.org/10.1142/s021812660500274x.

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Abstract (sommario):

A novel micro-power current sense amplifier employing a cross-coupled current-mirror configuration is presented. The circuit is designed for low-voltage low-power SRAM applications. Its sensing speed is independent of the bit-line capacitances and is almost insensitive to the data-line capacitances. Extensive post-layout simulation results based on a 1.8 V/0.18 μm CMOS technology from Chartered Semiconductor Manufacturing Ltd. (CHRT) have verified that the new sense amplifier promises a much sought-after power-efficient advantage and a note-worthy power-delay product superiority over the conventional and recently reported sense amplifier circuits. These attributes of the proposed sense amplifier make it judiciously appropriate for use in the contemporary high-complexity regime, which incessantly craves for low-power characteristics.

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35

Maheshwari, Sudhanshu, e Iqbal A. Khan. "Current Controlled Current Differencing Buffered Amplifier: Implementation and Applications". Active and Passive Electronic Components 27, n. 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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36

Aggarwal, Amit, e Sanket Kansal. "The Architecture of Memory for Core Processors". Journal of Futuristic Sciences and Applications 4, n. 2 (2021): 31–38. http://dx.doi.org/10.51976/jfsa.422105.

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The effectiveness and storage capacity of single-bit cache memory have been investigated. Write driver circuit, random access memory cell, and current mode detector make up the single-bit cache. Using various strategies, such as power-saving components like current mode sensing amplifiers and static random access memory cells, memory systems with just one bit of cache can use less power. To save power, substitute a forced stack and a current mode detecting amplifier for a single-bit cache.

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37

Walde, Nisha, e Syed Naseem Ahmad. "Voltage -Mode Multifunction Filter using Current Feedback Operational Amplifier". International Journal of Computer Applications 86, n. 16 (16 gennaio 2014): 10–12. http://dx.doi.org/10.5120/15068-3432.

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38

Dutt, Ravi. "High Speed Current Mode Sense Amplifier for SRAM Applications". IOSR Journal of Engineering 02, n. 05 (maggio 2012): 1124–27. http://dx.doi.org/10.9790/3021-020511241127.

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39

Eldeeb, Mohammed A., Yehya H. Ghallab, Yehea Ismail e Hassan El-Ghitani. "A 0.4-V Miniature CMOS Current Mode Instrumentation Amplifier". IEEE Transactions on Circuits and Systems II: Express Briefs 65, n. 3 (marzo 2018): 261–65. http://dx.doi.org/10.1109/tcsii.2017.2685589.

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40

BRUUN, ERIK. "A differential-input, differential-output current mode operational amplifier". International Journal of Electronics 71, n. 6 (dicembre 1991): 1047–56. http://dx.doi.org/10.1080/00207219108925545.

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41

Cini, Ugur, e Ali Toker. "DVCC-based very low-offset current-mode instrumentation amplifier". International Journal of Electronics 104, n. 8 (28 febbraio 2017): 1346–57. http://dx.doi.org/10.1080/00207217.2017.1296592.

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42

Bruun, E. "High speed, current conveyor based voltage mode operational amplifier". Electronics Letters 28, n. 8 (1992): 742. http://dx.doi.org/10.1049/el:19920470.

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43

Steadman, Roger, Gereon Vogtmeier, Armin Kemna, Salah Eddine Ibnou Quossai e Bedrich J. Hosticka. "An In-Pixel Current-Mode Amplifier for Computed Tomography". IEEE Sensors Journal 6, n. 6 (dicembre 2006): 1372–73. http://dx.doi.org/10.1109/jsen.2006.884450.

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44

Bouzerara, Lyes, e Mohand Belaroussi. "Current mode approach: High performance 0.35 μm CMOS class AB push-pull current amplifier". Facta universitatis - series: Electronics and Energetics 16, n. 2 (2003): 195–204. http://dx.doi.org/10.2298/fuee0302195b.

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Abstract (sommario):

A very high bandwidth class AB (Push-Pull) current amplifier using the compensation resistor technique is presented and analyzed. Such technique stands as a powerful method of bandwidth enhancement for general circuits using CMOS current mirrors. The proposed bandwidth is enhanced from 675 MHz for the uncompensated current amplifier to 745MHz for the compensated one without affecting the current gain and other design parameters such as power consumption and output swing. The circuit exhibits a current gain of 20 dB and consumes 1.48 mW for ?2.5V power supply voltage. All simulation results were performed using Hspice tool with 0.35^m CMOS TSMC parameters.

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45

Abuelma'atti, Muhammad Taher. "New Current-Mode Notch and Allpass Filters with Single Current Difference Amplifier". Active and Passive Electronic Components 19, n. 1 (1996): 25–32. http://dx.doi.org/10.1155/1996/48649.

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A new configuration for realization of current-mode notch and allpass filters is presented. It can synthesize second-order notch and allpass filters using a single current difference (Norton) amplifier and at most eight passive RC one port elements. Experimental results obtained from a notch filter realization are presented.

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46

Prasad, Dinesh, D. R. Bhaskar e A. K. Singh. "Universal current-mode biquad filter using dual output current differencing transconductance amplifier". AEU - International Journal of Electronics and Communications 63, n. 6 (giugno 2009): 497–501. http://dx.doi.org/10.1016/j.aeue.2008.02.012.

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47

Ghallab, Y. H., W. Badawy, K. V. I. S. Kaler e B. J. Maundy. "A Novel Current-Mode Instrumentation Amplifier Based on Operational Floating Current Conveyor". IEEE Transactions on Instrumentation and Measurement 54, n. 5 (ottobre 2005): 1941–49. http://dx.doi.org/10.1109/tim.2005.854254.

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48

Kumar, Amit. "Comment: Novel voltage/current-mode quadrature oscillator using current differencing transconductance amplifier". Analog Integrated Circuits and Signal Processing 66, n. 1 (17 luglio 2010): 143. http://dx.doi.org/10.1007/s10470-010-9503-7.

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49

Kushwaha, Ajay Kumar, e Sajal K. Paul. "Current Mode Universal Filter Using Single Current Controlled Differential Difference Current Conveyor Transconductance Amplifier". Circuits and Systems 06, n. 10 (2015): 224–36. http://dx.doi.org/10.4236/cs.2015.610023.

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50

Siriphuchyanun, Montree, Phamorn Silapan e Winai Jaikla. "Low-offset BiCMOS Current Controlled Current Differencing Buffered Amplifier (CC-CDBA) and Applications". ECTI Transactions on Electrical Engineering, Electronics, and Communications 6, n. 1 (1 agosto 2007): 81–90. http://dx.doi.org/10.37936/ecti-eec.200861.171766.

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Abstract (sommario):

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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