Delta-sigma modulator

A delta-sigma modulator comprising:

• a capacitively-coupled amplifier including a sampling capacitor, a feedback capacitor, and an operational amplifier, the capacitively-coupled amplifier configured to amplify an analog input signal;
• a first integrator being a correlated double sampling integrator, the first integrator configured to be a first-stage integrator located after the capacitively-coupled amplifier;
• a second integrator configured to be located after the first integrator;
• a quantizer configured to be located after the second integrator to quantize an output value of the second integrator;
• a digital-to-analog converter configured to
• execute digital-to-analog conversion of an output of the quantizer, and
• execute feedback of the output of the quantizer to the first integrator and the second integrator after the digital-to-analog conversion of the output of the quantizer;
• a first switch configured to be connected between an input of the capacitively-coupled amplifier and the sampling capacitor of the capacitively-coupled amplifier to execute a chopping operation;
• a second switch configured to be connected between an output of the capacitively-coupled amplifier and an input of the first integrator to execute a chopping operation;
• a third switch connected between the second switch and the input of the first integrator;
• and
• a control circuit configured to
• execute modulation by controlling the first switch to execute the chopping operation at the input of the capacitively-coupled amplifier,
• execute demodulation by controlling the second switch to execute the chopping operation at the output of the capacitively-coupled amplifier, and
• import an output signal of the capacitively-coupled amplifier into the first integrator through the third switch after the demodulation.