Invention Grant
US08488808B2 Method of powering down an audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence 有权
使用定时电路对音频放大器进行掉电的方法,以顺序地对偏置控制和放大电路进行断电

  • Patent Title: Method of powering down an audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence
  • Patent Title (中): 使用定时电路对音频放大器进行掉电的方法,以顺序地对偏置控制和放大电路进行断电
  • Application No.: US13552368
    Application Date: 2012-07-18
  • Publication No.: US08488808B2
    Publication Date: 2013-07-16
  • Inventor: Chih-Haur Huang
  • Applicant: Chih-Haur Huang
  • Applicant Address: TW
  • Assignee: Himax Technologies Limited
  • Current Assignee: Himax Technologies Limited
  • Current Assignee Address: TW
  • Agency: Hayes Soloway P.C.
  • Main IPC: H04B15/00
  • IPC: H04B15/00
Method of powering down an audio amplifier with timing circuit to power down bias control and amplifying circuits in sequence
Abstract:
An audio amplifier includes a timing control circuit, an amplifying circuit, and a bias control circuit. The timing control circuit generates a first power down signal and a second power down signal, in which the first power down signal is asserted before the second power down signal is asserted. The amplifying circuit receives a bias voltage to amplify an audio signal and is deactivated when the first power down signal is asserted. The bias control circuit provides the bias voltage for the amplifying circuit and is deactivated when the second power down signal is asserted.
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