The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2007
Filed:
May. 20, 2003
Chu-ting Su, Hsinchu, TW;
Yi-shu Chang, TaiNan, TW;
Jul-cheng Huang, Hsinchu, TW;
Wen-chi Wang, YunLi Hsien, TW;
Chu-Ting Su, Hsinchu, TW;
Yi-Shu Chang, TaiNan, TW;
Jul-Cheng Huang, Hsinchu, TW;
Wen-Chi Wang, YunLi Hsien, TW;
Realtek Semiconductor Corp., Hsinchu, TW;
Abstract
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.