Patent ID: 7821432

Claim:
An AD converting apparatus that converts an analog input signal into a digital output signal, comprising: a plurality of AD converters supplied with sampling clocks differing from each other by prescribed phase amounts, each AD converter outputting an individual signal obtained by digitizing the input signal according to the supplied sampling clock; a plurality of amplitude-dependent characteristic correcting sections that are provided to correspond to the plurality of AD converters, each amplitude-dependent characteristic correcting section generating a corrected individual signal by correcting the individual signal output by the corresponding AD converter using a correction factor corresponding to an amplitude of the individual signal; and a combining section that generates the output signal by combining a plurality of the corrected individual signals, wherein each amplitude-dependent characteristic correcting section corrects the individual signal output by the corresponding AD converter such that the corrected individual signal approximates a prescribed value, and each amplitude-dependent characteristic correcting section generates the corrected individual signal by multiplying the individual signal by the correction factor, which corresponds to an inverse of a characteristic representing a ratio of (i) the individual signal output by the corresponding AD converter to (ii) a signal expected to be output from a reference AD converter.