| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technique for reducing the adverse effect of idle tones in the channels in a Delta Sigma-type A/D converter including a plurality of channels for converting analog input signals into digital signals. Ž<P>SOLUTION: The Delta Sigma-type A/D converter includes an L channel Lch for converting a left analog input signal AINL into a digital signal and an R channel Rch for converting a right analog input signal AINR into a digital signal. Each of the L channel Lch and the R channel Rch includes a DC dither circuit 115 for generating a DC addition voltage for shifting the frequency of an idle tone. In the L channel Lch and the R channel Rch, DC addition voltages generated by DC dither circuits 115 are different from each other. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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