Daniel Pilost

Analog-to-digital converter

The invention discloses an analog-digital converter and analog-to-digital conversion method, and the analog-digital converter comprises an input channel receiving analog signals, a first sampling-integrating unit and a second sampling-integrating unit. The first sampling-integrating unit receives analog signals, samples analog signals and then integrates a first feedback signal and the overlapping parts of the sampled analog signal so as to generate a first output signal. The second sampling-integrating unit receives a first output signal, samples the first output signal and integrates a second feedback signal and the overlapping part of the sampled first output signal so as to generate a second output signal. The analog-digital converter further comprises a feedback circuit so as to generate digital signals according to the second output signal and respectively supply the first feedback signal and the second feedback signal featuring digital signals to the first sampling-integrating unit and the second sampling-integrating unit. The analog-digital converter in the invention has higher signal to noise ratio and higher analog-digital converting precision.