Title :
dB-linear V-I converter using composite NMOS transistor
Author :
Duong, Quoc-Hoang ; Nguyen, Trung-Kien ; Duong, Hoang-Nam ; Lee, Sang-Gug
Author_Institution :
Inf. & Commun. Univ., Daejeon, South Korea
Abstract :
A new CMOS exponential V-I converter (EVIC), based on Taylor´s concept and using NMOS transistor, is presented in this paper. The proposed-modified Taylor series expansion is used to extend the dB-linear output current range. In a 0.25 μm CMOS process, the simulations show more than 22 dB output current range and 17 dB linear range with the linearity error less than ±0.5 dB. The power dissipation is less than 0.3 mW with ±1.5 V supply voltage. The proposed EVIC can be used for the design of an extremely low-voltage and low-power variable gain amplifier (VGA) and automatic gain control (AGC).
Keywords :
CMOS analogue integrated circuits; MOSFET; automatic gain control; convertors; differential amplifiers; power amplifiers; semiconductor device models; 0.25 micron; 17 dB; CMOS process simulation; Taylor series expansion; automatic gain control; composite NMOS transistor; dB linear V-I converter; low-voltage low-power variable gain amplifier; power dissipation; CMOS analog integrated circuits; CMOS digital integrated circuits; CMOS process; CMOS technology; Digital signal processing; Linearity; MOSFETs; Taylor series; Very large scale integration; Voltage;
Conference_Titel :
Microelectronics, 2003. ICM 2003. Proceedings of the 15th International Conference on
Print_ISBN :
977-05-2010-1
DOI :
10.1109/ICM.2003.1287710
