Patent ID: 8130125

Claim:
An A/D converter, comprising a comparing section for comparing a voltage level of an analog input signal with a voltage level of a ramp wave signal incrementally changing by a constant voltage range, for converting the voltage level of the analog input signal into digital data on the basis of a comparison result of the comparing section, the A/D converter further comprising a sample hold section, which includes at least one capacitance element as a sampling capacitance element, and is configured so that, when the analog input signal is applied to a terminal of the sampling capacitance element, the voltage level of the analog input signal is sample held by the sampling capacitance element, wherein the sample hold section applies a stabilization promoting voltage to the terminal of the sampling capacitance element so as to promote a stabilization in which an electric potential level of the terminal of the sampling capacitance element is stabilized towards a predetermined voltage when the analog input signal is applied to the terminal of the sampling capacitance element.