Title :
A 3.3-V CMOS wideband exponential control variable-gain-amplifier
Author :
Huang, Po-Chiun ; Chiou, Li-Yu ; Chorng-Kuang Wang
Author_Institution :
Dept. of Electr. Eng., Nat. Central Univ., Chung-Li, Taiwan
Abstract :
A CMOS cascadable variable gain amplifier (VGA) with exponential gain control characteristic is presented. The pseudo-exponential gain control function is realized by a source-coupled pair with diode-connected loads. It is suitable for low supply and high speed applications. Using 0.5 μm CMOS technology, experimental results show the bandwidth of the proposed amplifier is larger than 150 MHz with a gain control range of 15 dB. The power consumption is 12.5 mW from a 3.3-V power supply
Keywords :
CMOS analogue integrated circuits; automatic gain control; cascade networks; wideband amplifiers; 0.5 micron; 12.5 mW; 150 MHz; 3.3 V; CMOS wideband exponential control cascadable variable gain amplifier; diode-connected load; low-voltage high-speed circuit; pseudo-exponential gain control function; source-coupled pair; Analog-digital conversion; CMOS technology; Diodes; Dynamic range; Electric variables control; Feedback circuits; Gain control; Polynomials; Timing; Wideband;
Conference_Titel :
Circuits and Systems, 1998. ISCAS '98. Proceedings of the 1998 IEEE International Symposium on
Conference_Location :
Monterey, CA
Print_ISBN :
0-7803-4455-3
DOI :
10.1109/ISCAS.1998.704417
