Renesas Electronics Corporation

Tatsuo Sengoku

Toshio Kumamoto

Takashi Okuda

Akira Kitaguchi

There is provided a technique for reducing the adverse effect of idle tones in the channels in a &#x394;&#x3a3;-type A/D converter including a plurality of channels for converting analog input signals into digital signals. The &#x394;&#x3a3;-type A/D converter includes an L channel for converting a left analog input signal into a digital signal and an R channel for converting a right analog input signal into a digital signal. Each of the L channel and the R channel includes a DC dither circuit for generating a DC addition voltage for shifting the frequency of an idle tone. In the L channel and the R channel, DC addition voltages generated by DC dither circuits are different from each other.

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Tokyo, Japan

Tatsuo Sengoku