发明授权
- 专利标题: ΔΣ-type A/D converter
- 专利标题(中): &Dgr& S型A / D转换器
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申请号: US12911286申请日: 2010-10-25
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公开(公告)号: US07952506B2公开(公告)日: 2011-05-31
- 发明人: Toshio Kumamoto , Takashi Okuda , Tatsuo Sengoku , Akira Kitaguchi
- 申请人: Toshio Kumamoto , Takashi Okuda , Tatsuo Sengoku , Akira Kitaguchi
- 申请人地址: JP Kanagawa
- 专利权人: Renesas Electronics Corporation
- 当前专利权人: Renesas Electronics Corporation
- 当前专利权人地址: JP Kanagawa
- 代理机构: McDermott Will & Emery LLP
- 优先权: JP2008-113932 20080424
- 主分类号: H03M3/00
- IPC分类号: H03M3/00
摘要:
There is provided a technique for reducing the adverse effect of idle tones in the channels in a ΔΣ-type A/D converter including a plurality of channels for converting analog input signals into digital signals. The ΔΣ-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.
公开/授权文献
- US20110037633A1 DELTA SIGMA-TYPE A/D CONVERTER 公开/授权日:2011-02-17