Title :
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
fDate :
12/1/1996 12:00:00 AM
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;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
