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    • 10. 发明公开
    • USB 컴플라이언스 및 전력 하강 보호를 유지하면서 개선된 오디오 증폭기 성능
    • 改进的音频放大器性能在维护USB符合性和掉电保护
    • KR1020110131108A
    • 2011-12-06
    • KR1020110048466
    • 2011-05-23
    • 페어차일드 세미컨덕터 코포레이션
    • 스털츠줄리린슈라이어얼
    • H04L29/10H03F3/217G06F13/14
    • H03F3/181H03F1/52H03F2200/03H03F2200/414H04L29/10G06F13/14H03F3/217H04L29/08
    • PURPOSE: A method for improving audio amplifier performance while maintaining USB compliance and power down protection is provided to include a multiplexer circuit and an analog switch circuit in a feedback route, thereby increasing a signal gain of an audio circuit, output power, and THD. CONSTITUTION: A device(100) provides data and an audio to a single port. The device includes an audio amplifier circuit(105). The audio amplifier circuit provides an electrical audio analog signal. The device includes an output unit of the audio amplifier circuit and an analog switch circuit(110) connected to a port in series. The analog switch circuit includes a first input unit(112) which receives an analog audio signal and a second input unit(114) which receives a digital data signal. The analog switch circuit comprises an output unit(115) which provides either one of a digital data signal or an analog audio signal.
    • 目的:提供一种在保持USB兼容性和掉电保护的同时提高音频放大器性能的方法,以在反馈路径中包括多路复用器电路和模拟开关电路,从而增加音频电路的信号增益,输出功率和THD。 规定:设备(100)向单个端口提供数据和音频。 该装置包括音频放大器电路(105)。 音频放大器电路提供电音频模拟信号。 该装置包括音频放大器电路的输出单元和连接到串行端口的模拟开关电路(110)。 模拟开关电路包括接收模拟音频信号的第一输入单元(112)和接收数字数据信号的第二输入单元(114)。 模拟开关电路包括提供数字数据信号或模拟音频信号之一的输出单元(115)。