CMOS class-AB current mirrors for precision current-mode analog-signal-processing elements

Author

Kawahito, Shoji ; Tadokoro, Yoshiaki

Author_Institution

Dept. of Inf. & Comput. Sci., Toyohashi Univ. of Technol., Japan

Volume

43

Issue

12

fYear

1996

fDate

12/1/1996 12:00:00 AM

Firstpage

843

Lastpage

845

Abstract

CMOS class-AB current mirrors for high-precision current-mode analog-signal-processing elements are described. The class-AB configuration allows us to reduce the offset error caused by device mismatch, the nonlinearity distortion, and power consumption. The offset error due to the device mismatch is greatly reduced by the reduction of the bias current. The class-AB current-mirror has less sensitivity to the mismatch since the bias current relative to the signal current can be reduced. The excellent precision is confirmed by Monte Carlo simulation and SPICE based on 1 μm CMOS LSI parameters

Keywords

CMOS analogue integrated circuits; analogue processing circuits; errors; large scale integration; 1 micron; CMOS LSI parameters; CMOS current mirrors; analog-signal-processing elements; bias current reduction; class-AB configuration; device mismatch; nonlinearity distortion reduction; offset error reduction; power consumption reduction; precision current-mode signal-processing; Analog-digital conversion; CMOS technology; Energy consumption; Filters; Large scale integration; MOSFET circuits; Mirrors; SPICE; Signal processing; Threshold voltage;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.553403

Filename

553403