发明申请
- 专利标题: Duplicate feedback network in class D amplifiers
- 专利标题(中): D类放大器中的重复反馈网络
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申请号: US12799601申请日: 2010-04-28
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公开(公告)号: US20110248781A1公开(公告)日: 2011-10-13
- 发明人: Anthony Gribben , Mykhaylo Teplechuk
- 申请人: Anthony Gribben , Mykhaylo Teplechuk
- 专利权人: Dialog Semiconductor GmbH
- 当前专利权人: Dialog Semiconductor GmbH
- 优先权: EP10392001.3 20100412
- 主分类号: H03F3/217
- IPC分类号: H03F3/217
摘要:
A circuit and a method are provided for suppressing the pop and click noise during the power on and power off of Class D amplifiers. The technique also suppresses pops and clicks when the Class D amplifier enters or exits standby mode. A duplicate feedback network is used to establish the stable operating points, including offsets in the Class D circuit without turning on the outputs. The technique works by gradually propagating or dissipating the offset through the signal path of a Class D amplifier by swapping the differential outputs using switches to suppress pops and clicks when starting up and shutting down the amplifier.
公开/授权文献
- US08159299B2 Duplicate feedback network in class D amplifiers 公开/授权日:2012-04-17
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