Patent ID: 8497793

Claim:
An analog-to-digital converter with delta-sigma modulation, comprising: at least one modulation unit, comprising: a first input capacitor and a second input capacitor, sampling a first input signal and a second input signal in a swapping manner; an operational amplifier, having a first input terminal, a second input terminal, a first output terminal and a second output terminal, wherein the first and second output terminals are operative to output a first output signal and a second output signal of the modulation unit, respectively; a first integration capacitor coupled between the first input terminal and the first output terminal of the operational amplifier, and a second integration capacitor coupled between the second input terminal and the second output terminal of the operational amplifier, wherein the first and second integration capacitors are coupled to the first and second input capacitors in a swapping manner; and a feedback control circuit, generating a first feedback amount and a second feedback amount to be coupled to the first integration capacitor and the second integration capacitor in a swapping manner; and a comparator, having a non-inverted input terminal and an inverted input terminal coupled to the first and second output signals of the modulation unit, respectively, and further having an output terminal operative to output a digital signal, wherein the output terminal of the comparator is further coupled to the feedback control circuit to control the first and second feedback amounts.