Delta-sigma analog-to-digital converter and battery monitor device

Abstract

A delta-sigma A/D converter uses a differential operational amplifier. The first integrator has a differential configuration and includes a pair of feedback capacitors that are feedback-connected between the differential input terminals and the differential output terminals of the operational amplifier, and is provided with a switched capacitor that includes a chopping switch that can switch the polarity between the differential input terminals of the operational amplifier and the pair of feedback capacitors. The switch resets the potential of the differential input terminals of the operational amplifier at the timing when the feedback capacitor in the first integrator and the differential input terminals of the operational amplifier are disconnected by the chopping switch.

Dependencies are inferred from the claim text.