Patent ID: 6397048
Filing Date: 2002-05-28
Classification: G06F,H03H

Abstract:
A signal processing apparatus comprising:clock signal generating means for generating a plurality of clock signals of which frequencies are mutually equal and of which phases are different from each other; a plurality of sampling means to which an input signal including signal components as processing objects within a predetermined input frequency band is supplied in parallel, which sampling means samples the input signal according to any one of the plurality of clock signals and outputs the sampled input signal sequentially as a sample signal; sum-of-products operating means for periodically finding, with a timing based on an operating frequency which is equal to the frequency of the plurality of clock signals, a total sum of products of each of the sample signals outputted from all of the sampling means respectively and each of a plurality of predetermined multiplication coefficients; and output filter means for only passing components within an output frequency band which is different from the input frequency band, in a sum-of-products signal which is constituted of the total sums of products aligned in order of being found.