Title :
A low-voltage low-power high dB-linear and all CMOS exponential V-I conversion circuit
Author :
Duong, Quoc-Hoang ; Lee, Sang-Gug
Author_Institution :
RFME Lab., Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
A very compact, all CMOS, exponential V-I conversion circuit is proposed for low-voltage and low-power applications. The exponential characteristic is based on the Taylor concept. A new technique to improve the dB-linear output current range of the V-I circuit has been introduced. Based on a 0.18 μm CMOS process, the measured results show 44 dB of output current range with a very low current consumption of less than 0.18 mA from a 1.2 V supply voltage. The chip size, excluding bond-pads, is 170×90 μm. The proposed circuit can be used for the design of low-voltage, low-power analog and mixed-mode circuits such as variable gain amplifiers (VGA), automatic gain control (AGC), etc.
Keywords :
CMOS analogue integrated circuits; electric current; electric potential; integrated circuit design; mixed analogue-digital integrated circuits; series (mathematics); 0.18 micron; 1.2 V; 170 micron; 90 micron; Taylor concept; Taylor series expansion; all CMOS exponential V-I conversion circuit; analog circuits; automatic gain control; current consumption; mixed-mode circuits; output current range; supply voltage; variable gain amplifiers; Batteries; Bonding; CMOS process; Circuits; Current measurement; Laboratories; Linearity; Semiconductor device measurement; Taylor series; Voltage;
Conference_Titel :
Radio Frequency integrated Circuits (RFIC) Symposium, 2005. Digest of Papers. 2005 IEEE
Print_ISBN :
0-7803-8983-2
DOI :
10.1109/RFIC.2005.1489906
