NDLI: All CMOS current-mode exponential function generator

Content Provider	IEEE Xplore Digital Library
Author	Quoc-Hoang Duong Hoang-Nam Duong Trung-Kien Nguyen Sang-Gug Lee
Copyright Year	2004
Description	Author affiliation: Information and Communication University (Quoc-Hoang Duong)
Abstract	This paper proposed an ultra low-voltage low-power all CMOS current-mode exponential function circuit. The design of the circuit is based on Taylor series expansion for realizing the exponential characteristic and composed of MOS transistors operating in the saturation region. The advantages of the circuit are that its input range can he tuned by adjusting the biased current and its output current presents a very low temperature coefficient. The simulations, based on a 0.25 μm CMOS process, show a 20 dB linear output current range and a 15 dB-linear range with the linearity error less than ± 0.5 dB at 1.2SV supply voltage. The proposed circuit could he used for the design of an extremely low-voltage low-power automatic gain control (AGC) and variable gain amplifier (VGA).
Starting Page	528
Ending Page	531
File Size	247072
Page Count	4
File Format	PDF
ISBN	8955191197
DOI	10.1109/ICACT.2004.1292926
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-02-09
Publisher Place	Korea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Signal generators Taylor series Equations Linearity CMOS technology Character generation MOSFETs Tuned circuits Temperature distribution Circuit simulation V-I converter dB-Linear Exponential function
Content Type	Text
Resource Type	Article

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