IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
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A novel fully-differential class AB folded-cascode OTA
Mohammad YavariOmid Shoaei
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JOURNALS FREE ACCESS

2004 Volume 1 Issue 13 Pages 358-362

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Abstract

This paper presents a new single-stage fully-differential class AB folded-cascode operational transconductance amplifier (OTA) for low-voltage and fast-settling switched-capacitor circuits in pure digital CMOS technology. The proposed OTA employs class AB operation in both the input-stage and output current source transistors resulting in large slew rate, enhanced unity-gain bandwidth and DC gain. The method to build the class AB operation in the output current source transistors is very simple which does not need any extra circuit and power consumption. HSPICE simulation results are presented to show the usefulness of the proposed OTA's structure.

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© 2004 by The Institute of Electronics, Information and Communication Engineers
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