Precision plural input voltage amplifier and comparator

摘要

A high-gain, capacitor-coupled, chopper-stabilized, direct-current, voltage amplifier is capacitor coupled to a plurality of input switch pairs, each of which alternately couples one of a pair of input terminals to the amplifier. Thus, a voltage comparator results which has a plurality of pairs of inverting and non-inverting inputs. The relative contribution of the inputs can be weighted by ratioing the coupling capacitors of the switch pairs.