Title :
A 35 dB-linear exponential function generator for VGA and AGC applications
Author :
Duong, Quoc-Hoang ; Lee, Sang-Gug
Author_Institution :
Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
A new current-mode based exponential function generator with high dB-linear range is developed. The exponential function is based on Taylor´s concept. The proposed circuit is composed of current-to-current squarers, current multipliers, and a linear V-I converter with linearization technique. Based on a 0.25 μm CMOS process, the simulations show a 35 dB-linear output current range with the linearity error less than 0.5 dB. The power dissipation is less than 0.3 mW at 1.25 V supply voltage.
Keywords :
CMOS integrated circuits; function generators; linearisation techniques; AGC application; CMOS process; Taylor concept; VGA application; dB-linear exponential function generator; linear V-I converter; linearization technique; CMOS process; CMOS technology; Character generation; Circuit simulation; Linearity; Linearization techniques; Power dissipation; Signal generators; Taylor series; Voltage;
Conference_Titel :
Design Automation Conference, 2004. Proceedings of the ASP-DAC 2004. Asia and South Pacific
Print_ISBN :
0-7803-8175-0
DOI :
10.1109/ASPDAC.2004.1337585
