AUTOMATIC AND CONTINUOUS OFFSET COMPENSATION OF MOS OPERATIONAL-AMPLIFIERS USING FLOATING-GATE TRANSISTORS

This paper presents a new approach that exploits floating-gate MOS tra nsistors and a feedback control loop to automatically compensate the o ffset of MOS operational amplifiers in a continuous manner that substa ntially improves the state of the art in the field. The proposed metho d can be repeatedly used to compensate the effects of environmental an d device modifications, while the possibility to accurately program an arbitrary value of the offset can be exploited to realize high perfor mance and/or programmable comparators and A/D converters.