Patent ID: 8130132

Claim:
A differential chopper comparator for comparing an input signal voltage and a first voltage comprising: a first capacitor; a second capacitor; and a differential amplification unit including a differential amplification circuit, wherein one of the input signal voltage and the first voltage is applied to one end of the first capacitor via a first switch unit, a second voltage is applied to one end of the second capacitor via a second switch unit, one of a non-inverting input terminal and an inverting input terminal of the differential amplification circuit is connected to the other end of the first capacitor, and the other one of the non-inverting input terminal and the inverting input terminal is connected to the other end of the second capacitor, and an impedance of the first switch unit side viewed from the one end of the first capacitor and an impedance of the second switch unit side viewed from the one end of the second capacitor are substantially same.