Harmonic distortion in CMOS current mirrors

Author

Bruun, Erik

Author_Institution

Dept. of Inf. Technol., Tech. Univ., Lyngby, Denmark

Volume

1

fYear

1998

Firstpage

567

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.1998.704572

Filename

704572