Invention Grant
- Patent Title: Voltage supply circuit, audio output apparatus, and voltage supplying method
- Patent Title (中): 电源电路,音频输出装置和电压供给方式
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Application No.: US13787831Application Date: 2013-03-07
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Publication No.: US09118291B2Publication Date: 2015-08-25
- Inventor: Wei-Lun Wu
- Applicant: Wistron Corporation
- Applicant Address: TW New Taipei
- Assignee: Wistron Corporation
- Current Assignee: Wistron Corporation
- Current Assignee Address: TW New Taipei
- Agency: Jianq Chyun IP Office
- Priority: TW101133541A 20120913
- Main IPC: H03G3/32
- IPC: H03G3/32 ; H03G3/20 ; H03F1/02 ; H03G3/00 ; H03G3/30 ; H03F3/21

Abstract:
A voltage supply circuit is provided. The voltage supply circuit includes a voltage amplifier and a power selecting circuit. A power terminal of the voltage amplifier receives an operation power and outputs a gain voltage for driving an output device. The power selecting circuit receives a plurality of supply voltages and supplies one of the supply voltages to the power terminal of the voltage amplifier as the operation power according to a volume level of an audio signal. An audio output apparatus and a voltage supplying method thereof are also provided. The audio output apparatus includes the voltage supply circuit and a speaker.
Public/Granted literature
- US20140072144A1 VOLTAGE SUPPLY CIRCUIT, AUDIO OUTPUT APPARATUS, AND VOLTAGE SUPPLYING METHOD Public/Granted day:2014-03-13
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