Data converter for cancelling offset voltage

Abstract

A data converter including an autozeroing circuit including a plurality of gain circuits having a first amplification circuit and a first capacitor connected to the first amplification circuit, the first amplification circuit performing a switch feedthrough offset cancellation operation of storing an offset voltage of the autozeroing circuit in the capacitor through a switch, a comparator circuit including a first input terminal and a second input terminal, the comparator circuit comparing a first input terminal voltage level of the first input terminal with a second input terminal voltage level of the second input terminal, a first switch unit connected between the autozeroing circuit and the comparator circuit, the first switch disconnecting the autozeroing circuit from the comparator circuit during the switch feedthrough offset cancellation operation of the autozeroing circuit, and a second switch unit connected between a first input signal line and a second input signal line.