Title :
Harmonic distortion in CMOS current mirrors
Author_Institution :
Dept. of Inf. Technol., Tech. Univ., Lyngby, Denmark
Abstract :
One of the origins of harmonic distortion in CMOS current mirrors is the inevitable mismatch between the MOS transistors involved. In this paper we examine both single current mirrors and complementary class AB current mirrors and develop an analytical model for the mismatch induced harmonic distortion. This analytical model is verified through simulations and is used for a discussion of the impact of mismatch on harmonic distortion properties of CMOS current mirrors. It is found that distortion levels somewhat below 1% can be attained by carefully matching the mirror transistors but ultra low distortion is not achievable with CMOS current mirrors
Keywords :
CMOS analogue integrated circuits; amplifiers; harmonic distortion; linear network analysis; CMOS current mirrors; MOS transistors; MOSFET mismatch; analytical model; complementary class AB current mirrors; harmonic distortion; mirror transistors; mismatch induced distortion; single current mirrors; Analytical models; Circuits; Harmonic distortion; Information technology; Linearity; Mirrors; Nonlinear distortion; Semiconductor device modeling; Signal processing; Threshold voltage;
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.1998.704572
