Incremental delta-sigma A/D modulator and A/D converter

An incremental delta-sigma A/D modulator comprising:

• an analog integrator configured to integrate input signals;
• a quantizer configured to quantize output signals of the analog integrator;
• a D/A converter configured to D/A convert based on an output of the quantizer;
• and
• a reset signal output device configured to output a reset signal for resetting the analog integrator, the incremental delta-sigma A/D modulator operating at a predetermined oversampling ratio,
• wherein the analog integrator includes a first plurality of switched capacitors, an operational amplifier connected to the first plurality of switched capacitors, and a feedback capacitor connecting an input and an output of the operational amplifier;
• respective identical signals are input to respective corresponding switched capacitors of the first plurality of switched capacitors, and
• the first plurality of switched capacitors are configured to sequentially transfer electric charges stored in the respective switched capacitors to the feedback capacitor at each oversampling of the incremental delta-sigma A/D modulator.