Invention Grant
US09118291B2 Voltage supply circuit, audio output apparatus, and voltage supplying method 有权
电源电路,音频输出装置和电压供给方式

Voltage supply circuit, audio output apparatus, and voltage supplying method
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.
Information query
Patent Agency Ranking
0/0