Title :
Current mirror compensation for transistor mismatch
Author :
Taillefer, Chris ; Wang, Chunyan
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
An accurate CMOS current mirror circuit operating in a very weak current range is proposed to compensate for transistor mismatch. A procedure that automatically adjusts the gate-to-source voltages of the transistor pair is implemented to compensate for the physical parameter mismatch in order to ensure an acceptable accuracy in the current operation. The proposed design operates with less than 1% error for a 20% geometric mismatch in the current range of 1 nA to 1 μA. This circuit may be implemented using a CMOS single poly technology
Keywords :
CMOS analogue integrated circuits; circuit feedback; compensation; current mirrors; 0.35 micron; 1 nA to 1 muA; CMOS current mirror circuit; CMOS single poly technology; current mirror compensation; gate-to-source voltages; physical parameter mismatch; transistor mismatch; transistor pair; very weak current range; CMOS technology; Circuits; Doping; Mirrors; Nonvolatile memory; Signal design; Signal processing; Silicon; Virtual colonoscopy; Voltage;
Conference_Titel :
Circuits and Systems, 2000. Proceedings. ISCAS 2000 Geneva. The 2000 IEEE International Symposium on
Conference_Location :
Geneva
Print_ISBN :
0-7803-5482-6
DOI :
10.1109/ISCAS.2000.856377
