Invention Grant
US09231543B2 Audio power amplification with reduced input power supply crest factor
有权
音频功率放大，输入电源峰值因数降低
- Patent Title: Audio power amplification with reduced input power supply crest factor
- Patent Title (中): 音频功率放大，输入电源峰值因数降低
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Application No.: US14153984Application Date: 2014-01-13
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Publication No.: US09231543B2Publication Date: 2016-01-05
- Inventor: Roderick Hogan , Joseph J. Curcio , Nathan A. Johanningsmeier , Casey L. Hardy
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Blakely, Sokoloff, Taylor & Zafman LLP
- Main IPC: H03F99/00
- IPC: H03F99/00 ; H03G3/00 ; H03G3/20
Abstract:
A power converter has an output that is coupled in parallel with an energy reservoir circuit and a power supply node of an audio power amplifier. The converter can set an upper limit on its input supply current that is variable in accordance with a control input. A controller is to produce a signal, coupled to the control input of the power converter, that is responsive to a measure of input supply voltage of the power converter and either output voltage of the power converter or output power of the amplifier. Other embodiments are also described and claimed.
Public/Granted literature
- US20150200640A1 AUDIO POWER AMPLIFICATION WITH REDUCED INPUT POWER SUPPLY CREST FACTOR Public/Granted day:2015-07-16
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