- 专利标题: Audio switch circuit with slow turn-on
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申请号: US14748066申请日: 2015-06-23
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公开(公告)号: US09877104B2公开(公告)日: 2018-01-23
- 发明人: Lei Huang , Julie Stulz , Eric Li
- 申请人: Fairchild Semiconductor Corporation
- 申请人地址: US CA San Jose
- 专利权人: Fairchild Semiconductor Corporation
- 当前专利权人: Fairchild Semiconductor Corporation
- 当前专利权人地址: US CA San Jose
- 代理机构: Okamoto & Benedicto LLP
- 主分类号: H04R3/00
- IPC分类号: H04R3/00 ; H03K17/16 ; H03K17/687 ; H03F1/30
摘要:
An audio switch circuit includes negative feedback paths and a transistor that serves as a switching component. The negative feedback paths are turned ON to couple a source voltage and a drain voltage of the transistor to the gate of the transistor when the audio switch circuit is turned ON. The negative feedback paths reduce the slew rate of the gate-to-source voltage of the transistor, thereby slowing the turn-ON of the audio switch circuit to prevent or minimize unwanted audible noise. The negative feedback paths can be turned OFF after a period of time after the audio switch circuit is turned ON for improved total harmonic distortion.
公开/授权文献
- US20160182040A1 AUDIO SWITCH CIRCUIT WITH SLOW TURN-ON 公开/授权日:2016-06-23
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