Title :
Technique for offset voltage cancellation in MOS operational amplifiers
Author :
Wong, S.L. ; Salama, C.A.T.
Author_Institution :
University of Toronto, Department of Electrical Engineering, Toronto, Canada
Abstract :
A novel technique for the continuous-time removal of the input offset voltage in operational amplifiers is presented. This scheme converts a conventional op-amp into a similar differential-in/differential-out op-amp with zero differential input offset voltage. The nonzero common-mode input offset voltage can be isolated using a sampled-data time-averaging technique and minimised by negative feedback.
Keywords :
feedback; field effect integrated circuits; linear integrated circuits; operational amplifiers; MOS operational amplifiers; continuous-time removal; differential-in/differential-out op-amp; linear IC; negative feedback; nonzero common-mode input offset voltage; offset voltage cancellation; sampled-data time-averaging technique;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19850277
