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New class-AB operational transconductance amplifier for high-speed switched-capacitor circuits
Author(s)
Wongnamkum, S.
Thanachayanont, A.
Date Issued
December 1, 2004
Type
Conference Paper
Abstract
In this paper, a new differential class-AB operational transconductance amplifier for high-speed switched capacitor circuits is proposed. A new class-AB output circuit combines a shunt-feedback voltage follower circuit and the conventional folding output circuit to improve the slew rate and bandwidth. The OTA has been designed to operate with a supply voltage of 1.5-V, using a 0.35-μm CMOS technology. Simulation results for a load capacitance (C L) of 3-pF show 300-V/μs slew rate and 330-MHz unity-gain frequency.
Citation
IEEE International Symposium on Communications and Information Technologies Iscit 2004, 1, 531-535, 2004