Article

A slew rate enhancement technique for operational amplifiers based on a tunable active Gm-based capacitance multiplication circuit

Authors:

Ram Suryanarayan,

Anubhav Gupta,

Travis N. BlalockAuthors Info & Claims

GLSVLSI '03: Proceedings of the 13th ACM Great Lakes symposium on VLSI

Pages 273 - 276

https://doi.org/10.1145/764808.764879

Published: 28 April 2003 Publication History

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Abstract

A slew rate enhancement technique for operational amplifiers using a tunable active Gm-based current-mode capacitance multiplication circuit instead of the standard Miller compensation capacitor is developed. Low power and low area solutions for driving large capacitive loads are enabled by this technique. In a prototype amplifier, a 0.5 pF MOSFET is multiplied to an effective value of 285 pF, setting the dominant pole at 3 Hz. The slew rate, however, is controlled by the physical MOSFET capacitor. A slew rate as high as 1.5 V/ms is obtained for a standard two stage folded cascode opamp with a 2.5 mA differential pair tail current. An open loop gain of 101 dB and a phase margin of 56° are observed.

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G. A. Rincon-Mora, "Active Capacitor Multiplier in Miller-Compensated Circuits," IEEE J. Solid State Circuits, vol. 35, no. 1, pp. 26--32, Jan. 2000.

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K. Bult and G. Geelen, "A fast settling CMOS op-amp for SC circuits with 90 dB DC gain," IEEE J. Solid State Circuits, vol. 25, no. 12, pp. 211--213, Dec. 1990.

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Zuschu Yan Pui-In Mak Martins R(2011)Two Stage Operational Amplifiers: Power and Area Efficient Frequency Compensation for Driving a Wide Range of Capacitive LoadIEEE Circuits and Systems Magazine10.1109/MCAS.2010.93978311:1(26-42)Online publication date: 2011
https://doi.org/10.1109/MCAS.2010.939783
Zushu Yan Liangguo Shen Yuanfu Zhao Suge Yue (2008)A low-voltage CMOS low-dropout regulator with novel capacitor-multiplier frequency compensation2008 IEEE International Symposium on Circuits and Systems10.1109/ISCAS.2008.4542010(2685-2688)Online publication date: May-2008
https://doi.org/10.1109/ISCAS.2008.4542010

Index Terms

A slew rate enhancement technique for operational amplifiers based on a tunable active Gm-based capacitance multiplication circuit
1. Hardware
  1. Emerging technologies

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Information

Published In

GLSVLSI '03: Proceedings of the 13th ACM Great Lakes symposium on VLSI

April 2003

320 pages

ISBN:1581136773

DOI:10.1145/764808

General Chair:
Mircea Stan
University of Virginia
,
Program Chairs:
David Garrett
Bell Labs Research, Lucent Technologies
,
Kazuo Nakajima
University of Maryland

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 28 April 2003

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GLSVLSI03

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GLSVLSI03: Great Lakes Symposium on VLSI 2003

April 28 - 29, 2003

D. C., Washington, USA

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Overall Acceptance Rate 312 of 1,156 submissions, 27%

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Zuschu Yan Pui-In Mak Martins R(2011)Two Stage Operational Amplifiers: Power and Area Efficient Frequency Compensation for Driving a Wide Range of Capacitive LoadIEEE Circuits and Systems Magazine10.1109/MCAS.2010.93978311:1(26-42)Online publication date: 2011
https://doi.org/10.1109/MCAS.2010.939783
Zushu Yan Liangguo Shen Yuanfu Zhao Suge Yue (2008)A low-voltage CMOS low-dropout regulator with novel capacitor-multiplier frequency compensation2008 IEEE International Symposium on Circuits and Systems10.1109/ISCAS.2008.4542010(2685-2688)Online publication date: May-2008
https://doi.org/10.1109/ISCAS.2008.4542010

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Design of low-power single-stage operational amplifiers based on an optimized settling model

A robust, power- and area-efficient gm-control for low-noise operational amplifiers

An Adaptive Biased Single-Stage CMOS Operational Amplifier with a Novel Rail-to-Rail Constant-gm Input Stage