Analog digital convert apparatus, analog digital convert method, control apparatus and program

An AD converting method that uses a plurality of AD converters to convert an analog input signal into a digital output signal, comprising:

• supplying the plurality of AD converters with sampling clocks differing from each other by prescribed phase amounts, and causing each AD converter to output an individual signal obtained by digitizing the input signal according to the supplied sampling clock;
• generating a corrected individual signal for each AD converter by correcting the individual signal output by the AD converter using a correction factor corresponding to an amplitude of the individual signal;
• and
• generating the output signal by combining a plurality of the generated corrected individual signals.

A control apparatus that uses a plurality of AD converters to function as an AD converting apparatus that converts an analog input signal into a digital output signal, comprising:

• a clock output section that supplies the plurality of AD converters with sampling clocks differing from each other by prescribed phase amounts, causing each AD converter to output 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.

A program that causes a control apparatus to function as an AD converting apparatus that uses a plurality of AD converters to convert an analog input signal into a digital output signal, the program causing the control apparatus to function as:

• a clock output section that supplies the plurality of AD converters with sampling clocks differing from each other by prescribed phase amounts, causing each AD converter to output 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.