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Type: Conference paper
Title: A low-voltage operational amplifier with high slew-rate for sigma-delta modulators
Author: Choi, J.
Lim, J.
Lim, C.
Citation: IEEE International Symposium on Circuits and Systems, 2006: Proceedings: 21-24 May:pp.903-906
Publisher: IEEE
Publisher Place: Online
Issue Date: 2006
Series/Report no.: IEEE International Symposium on Circuits and Systems
ISBN: 0780393899
ISSN: 0271-4310
Conference Name: IEEE International Symposium on Circuits and Systems (2006 : Kos, Greece)
Statement of
Joongho Choi; Jinup Lim; Cheng Chew Lim
Abstract: This paper presents the design of a low-voltage operational amplifier suitable for sigma-delta (/spl Sigma//spl Delta/) modulator applications. The circuit technique is proposed to enhance the slew-rate performance and correspondingly can help to save the power of the amplifier. The simple circuitry of a current mirror is included with a degenerate resistor that can be selectively shunted. High-speed 2nd-order /spl Sigma//spl Delta/ modulators incorporating this technique is designed in a 0.18-/spl mu/m CMOS technology and power consumption can be saved more than 20% for a power supply voltage of 1.2V.
Rights: © 2006 IEEE
RMID: 0020064942
DOI: 10.1109/ISCAS.2006.1692732
Appears in Collections:Electrical and Electronic Engineering publications

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