公开(公告)号：US07194097B2

公开(公告)日：2007-03-20

申请号：US10441045

申请日：2003-05-20

申请人： Chu-Ting Su ,  Yi-Shu Chang ,  Jul-Cheng Huang ,  Wen-Chi Wang

发明人： Chu-Ting Su ,  Yi-Shu Chang ,  Jul-Cheng Huang ,  Wen-Chi Wang

IPC分类号： H03F21/00

CPC分类号： H03F3/68 ,  Y10T307/696

摘要： An Audio Codec which comprises a power selecting circuit an audio compiler circuit and a control amplifier circuit. The power selecting circuit receives at least a primary power source and an auxiliary power source and outputs a working power selected from the power sources. The auxiliary power source is selected and output to the control amplifier circuit only when the computer is at a power-off status. When the computer is power-on, the primary power source will be selected and output to both the audio compiler circuit and the control amplifier circuit. Therefore, the Audio Codec of the present invention only needs one set of internally furnished control amplifier circuit to both operate on the normal power-on status and perform the Power OFF CD function.

摘要翻译： 音频编解码器，其包括音频编译器电路和控制放大器电路的功率选择电路。 功率选择电路至少接收主电源和辅助电源，并输出从电源选择的工作电源。 只有当计算机处于断电状态时，辅助电源被选择并输出到控制放大器电路。 当计算机上电时，主电源将被选择并输出到音频编译器电路和控制放大器电路。 因此，本发明的音频编解码器仅需要一套内部布置的控制放大器电路，以在正常的开机状态下操作并执行断电CD功能。