Realizations of fully differential voltage second generation current conveyor with an application

Sobhy, Ehab A.; Soliman, Ahmed M.

doi:10.1002/cta.566

Cited by 22 publications

(15 citation statements)

References 12 publications

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“…Moreover, the mismatch between the bias transistors can be controlled through the sizing since the mismatch is inversely proportional to the square root of the transistor gate area. 22,23 One of the key points of the proposed FCS-based circuits is that there are no constraints on the transistor sizes. Hence, the mismatch can be controlled by increasing the transistors sizing under performance metrics constraints.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

Novel FCS-Based Layout-Friendly Accurate Wide-Band Low-Power Ccii- Realizations

Mostafa

Mohamed

Soliman

2010

J CIRCUIT SYST COMP

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This paper presents two novel Floating Current Source (FCS)-based CMOS negative second generation current conveyor (CCII−) realizations suitable for very large scale implementation. The proposed realizations provide high voltage and current tracking accuracy, as well as large voltage and current transfer bandwidths. Simulation results show that the¯rst proposed wideband CCII− bandwidth is about 972 MHz. Targeting low-power dissipation, a second low-power version of the wide-band CCII− is proposed at the expense of lower bandwidth and accuracy. The proposed CCII− realizations are layout-friendly because they can be easily fabricated in a systematic modular layout fashion. In addition, a fair comparison is held between the proposed realizations and the only FCS-based CCII− realizations in the literature to show the strength of the proposed circuits. The proposed two CCII− realizations show excellent immunity to process variations and transistor mismatch. In addition, they are insensitive to the temperature variations. Finally, two common CCII− applications are presented.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Novel FCS-Based Layout-Friendly Accurate Wide-Band Low-Power Ccii- Realizations

Mostafa

Mohamed

Soliman

2010

J CIRCUIT SYST COMP

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“…Note that, excluding resistors R1 and R2, the circuit in Fig.1 may be considered equivalent to a fullydifferential current conveyor [6], where the Y, X and Z terminals coincides with the (VIP, VIN), (VSP,VSN) and (VOP,VON) terminal pairs, respectively. Differently from typical current conveyor implementations, the proposed topology strongly relies on negative voltage feedback to improve precision.…”

Section: A Principle Of Operationmentioning

confidence: 99%

A very compact CMOS instrumentation amplifier with nearly rail-to-rail input common mode range

Bruschi

Cesta

Longhitano

et al. 2014

ESSCIRC 2014 - 40th European Solid State Circuits Conference (ESSCIRC)

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This paper presents a compact, fully-differential instrumentation amplifier with nearly rail-to-rail input common mode range. The amplifier, which is based on an original topology, embodies chopper modulation for offset and flicker noise reduction. The paper describes the experimental results obtained with a prototype designed with the UMC 0.18 μm MM/RF CMOS process. The amplifier draws 42 μA at a supply voltage of 1.8 V with an input noise voltage density of 75 nV/sqrt(Hz). Total amplifier area is 0.056 mm2

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“…Various structures of CMIA have yet been reported, among which CMIAs based on FDCCIIs take the lead; because these structures are free from well-matched active blocks, as well as matched resistors to gain a high CMRR. The second generation current conveyors (CCIIs) are active blocks that have been used in many analog circuits such as oscillators [19][20][21][22][23], active filters [24][25][26] and amplifiers [6][7][8][9][10][11][12][13][14][15][16][17][18] to grant current mode benefits. The fully differential type of CCIIs [19][20][21][22] benefits from differential input and output terminals that are strongly acknowledged today.…”

Section: -Introductionmentioning

confidence: 99%

A Novel Fully Differential Second Generation Current Conveyor and Its Application as a Very High CMRR Instrumentation Amplifier

Ahmadi

Azhari

2018

ESJ

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This paper aims to introduce a novel Fully Differential second generation Current Conveyor (FDCCII) and its application to design a novel Low Power (LP), very high CMRR, and wide bandwidth (BW) Current Mode Instrumentation Amplifier (CMIA). In the proposed application, CMRR, as the most important feature, has been greatly improved by using both common mode feed forward (CMFF) and common mode feedback (CMFB) techniques, which are verified by a perfect circuit analysis. As another unique quality, it neither needs well-matched active blocks nor matched resistors but inherently improves CMRR, BW, and power consumption hence gains an excellent matchless choice for integration. The FDCCII has been designed using 0. 1-IntroductionIn the last decades, researchers and designers of analog processors have been faced with serious challenges in the design of low-voltage (LV), low-power (LP) circuits and systems. That is due the increasing demand for mobile and battery powered equipment and also technology down scaling trend [1]. Current mode (CM) signal processing/design as a promising solution to these challenges has thus gained more popularity [1][2][3][4][5]. As the main reason of the superiority of CM processors over the Voltage Mode (VM) ones can name: the wider dynamic range, simpler circuitry, wider BW, higher speed/frequency, lower supply voltage and consumed power [4][5][6][7][8][9][10][11][12][13][14]. Besides, while the Voltage Mode Instrumentation Amplifiers (VMIA) seriously suffer from problems of dependency of BW on gain and CMRR value, and need tightly matched resistor (to improve the CMRR), most favorably, the Current Mode Instrumentation Amplifiers (CMIA) are free from such requirements [6][7][8][9][10][11][12][13][14][15][16][17][18]. Various structures of CMIA have yet been reported, among which CMIAs based on FDCCIIs take the lead; because these structures are free from well-matched active blocks, as well as matched resistors to gain a high CMRR. The second generation current conveyors (CCIIs) are active blocks that have been used in many analog circuits such as oscillators [19][20][21][22][23], active filters [24][25][26] and amplifiers [6][7][8][9][10][11][12][13][14][15][16][17][18] to grant current mode benefits. The fully differential type of CCIIs [19][20][21][22] benefits from differential input and output terminals that are strongly acknowledged today. In this paper we seek to design a novel FDCCII structure to realize a high CMRR IA. 2-Proposed FDCCIIFunctional block diagram and operational matrix of an ideal FDCCII are shown in Figure 1 and Equation 1, respectively.

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Realizations of fully differential voltage second generation current conveyor with an application

Cited by 22 publications

References 12 publications

Novel FCS-Based Layout-Friendly Accurate Wide-Band Low-Power Ccii- Realizations

Novel FCS-Based Layout-Friendly Accurate Wide-Band Low-Power Ccii- Realizations

A very compact CMOS instrumentation amplifier with nearly rail-to-rail input common mode range

A Novel Fully Differential Second Generation Current Conveyor and Its Application as a Very High CMRR Instrumentation Amplifier

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