Patent ID: 7656334

Claim:
A signal-processing unit, comprising: an input unit configured to provide a plurality of analog input signals; a multiplexer circuit that receives said plurality of analog signals from said input unit and outputs the plurality of analog signals to one signal line in a desired sequence; an analog-digital conversion circuit that sequentially converts each analog signal output from the multiplexer circuit into a digital signal and outputs the digital signal; and a cross talk compensation circuit configured (1) to receive a plurality of the digital signals sequentially outputted from said analog-digital conversion circuit, (2) to assign, for each digital signal of the plurality of digital signals, a corresponding set of coefficients selected so as to compensate for interference effect levels between the plurality of analog input signals and (3) to calculate, for each digital signal of the plurality of digital signals, an output value by multiplying the plurality of digital signals by said corresponding set of coefficients and summing the multiplied signals.