Title :
Accurate two-transistor current mirrors
Author :
Milam, Stephen W. ; Allen, Phillip E.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
A tuning method for current mirrors has been proposed and tested in a 2-μm CMOS process. The method compensates for mismatches in both the transconductance and threshold voltage of the transistors. Results show that with a transconductance tuning resolution of 0.78% and a threshold voltage tuning resolution of 0.088%, the mirrors can be tuned to an average accuracy of 0.25% even though the untuned circuits have current gain errors as high as 6.59%
Keywords :
CMOS analogue integrated circuits; amplifiers; circuit tuning; compensation; errors; 2 micron; CMOS process; current gain errors; mismatch compensation; threshold voltage; threshold voltage tuning resolution; transconductance; transconductance tuning resolution; tuning method; two-transistor current mirrors; CMOS process; CMOS technology; Circuit optimization; Costs; MOSFETs; Mirrors; Random variables; Testing; Threshold voltage; Transconductance;
Conference_Titel :
Circuits and Systems, 1994., Proceedings of the 37th Midwest Symposium on
Conference_Location :
Lafayette, LA
Print_ISBN :
0-7803-2428-5
DOI :
10.1109/MWSCAS.1994.519211
