Title :
Realisation of exponential V-I converter using composite NMOS transistors
Author :
Liu, Weihsing ; Cheng-Chieh Chang ; Liu, Shen-Iuan
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
1/6/2000 12:00:00 AM
Abstract :
A CMOS voltage-to-current converter with exponential characteristics is presented. The Taylor´s series expansion is used for realising the exponential function. In a 0.35 μm CMOS process, the HSPICE simulation results show a 15 dB linear range with a linearity error of <±0.5 dB. The total power consumption is <0.8 mW with ±1.5 V supply voltage. The circuit can be used in the design of a variable gain amplifier (VGA)
Keywords :
CMOS analogue integrated circuits; SPICE; circuit simulation; convertors; integrated circuit modelling; -1.5 to 1.5 V; 0.35 micron; CMOS voltage-to-current converter; HSPICE simulation results; Taylor´s series expansion; composite NMOS transistors; exponential V-I converter; linearity error; total power consumption; variable gain amplifier;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000051
