Patent ID: 8884914

Claim:
A method for signal detection, comprising: providing a resistor-capacitor (RC) circuit for providing at least one capacitive coupling signal; receiving a noise synchronizing signal which triggers at least one non-integration period, wherein the RC circuit is affected by a predictable noise in the at least one non-integration period; providing at least one integration control signal for controlling integration detection on the at least one capacitive coupling signal in a plurality of clock cycles in the at least one non-integration period; and performing integration detection on the at least one capacitive coupling signal, evading predictable noise, based on the at least one integration control signal; and pairwisely interchanging signal sources of a pair of inputs in each of at least two subtractors based on the synchronizing signal, an output of each of the subtractor providing a respective signal difference of the pair of the inputs, wherein each integration circuit performs integration detection on a signal difference of a pair of outputs in the outputs of each subtractor, respectively.