A high slew-rate voltage-mode op-amp

Hunt, Mitchell; Lidgey, John

doi:10.1109/iscas.1992.230651

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…In this new design the CMRR performance can be further improved, dramatically, by adopting common-mode bootstrapping to the complementary pair transistors Q 3 /Q 4 . Adding Q 21 /Q 23 as well as Q 22 /Q 24 , in association with diode-connected transistors Q 25 /Q 26 /Q 27 and Q 28 /Q 29 /Q 30 , bootstraps, Q 3 /Q 4 by keeping their collector-base voltages virtually constant [19]. Fig.…”

Section: Modified Cfoamentioning

confidence: 99%

Wide-bandwidth CFOA with high CMRR performance

Tammam

Hayatleh

Sebu

et al. 2014

AEU - International Journal of Electronics and Communications

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In this paper the authors analyse the conventional current-feedback operational amplifier (CFOA) in terms of commonmode-rejection ratio (CMRR) performance, and having identified the mechanism primarily responsible for the CMRR, they propose two new architecture CFOAs. These new CFOAs are further developed, and modified to provide improved bandwidth, AC gain accuracy and high CMRR performance. The key features of the two proposed new CFOAs are the designs of the internal voltage followers which have two separate biasing currents with a similar dynamic architecture to that of the conventional CFOA. The magnitude of one bias current determines the value of the maximum CMRR, and the second can be used to maximise bandwidth.

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Section: Modified Cfoamentioning

confidence: 99%

Wide-bandwidth CFOA with high CMRR performance

Tammam

Hayatleh

Sebu

et al. 2014

AEU - International Journal of Electronics and Communications

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“…Over the last two decades, the telecommunication industry has experienced tremendous growth and demand for the state-of-the-art current-mode analogue design which provides solution to many circuit and system challenges (Vere Hunt & Lidgey, 1992).…”

Section: Introductionmentioning

confidence: 99%

Critical review of the circuit architecture of CFOA

Tammam

Hayatleh

Ben-Esmael

et al. 2013

International Journal of Electronics

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This study investigates the closed-loop performance of the basic current feedback operational amplifier (CFOA), with particular emphasis on its dynamic response. It also focuses on the design, performance and advantages of the CFOA in its ability to provide a substantially constant closed-loop bandwidth for closed-loop voltage gain. Furthermore, an improved CFOA with wide bandwidth and common-mode-rejection ratio (CMRR) performance is also presented. The design presented in this article uses a bootstrapping technique with Quasi-Darlington in the input stage to reduce the influence of the Early effect which results in improved performance. Another advantage of this design is that the inverting input impedance is reduced significantly, which leads to further improvement in bandwidth and CMRR.

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“…This latter topology allows, among other things, slew-rate figures similar to those of CFOAs [2,6,7, 34,35]. Then the current produced by a differential voltage is conveyed via current mirrors.…”

Section: B Transconductorsmentioning

confidence: 99%

Analog universal active device: theory, design and applications

Carlosena

Cabeza

Proceedings of International Conference on Microelectronics

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This paper introduces the concept of what we call analog Universal Active Device (UAD), as an step forward from Dperational Amplifiers and other recently proposed active devices.The model of such device is proposed together with an approach to jbtain several practical silicon implementations for it. Non ideal :ffects of these practical implementations are theoretically analysed, md their influence in some circuit applications is comparatively jtudied. Simulation results are given supporting the Ideas presented here.

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A high slew-rate voltage-mode op-amp

Cited by 7 publications

References 2 publications

Wide-bandwidth CFOA with high CMRR performance

Wide-bandwidth CFOA with high CMRR performance

Critical review of the circuit architecture of CFOA

Analog universal active device: theory, design and applications

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