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:
Feb. 20, 2007
Filed:
Mar. 21, 2002
Applicants:
Shih-yu Ku, HsinChu, TW;
Wen-chi Wang, HsinChu, TW;
Yi-shu Chang, HsinChu, TW;
Chao-cheng Lee, HsinChu, TW;
Inventors:
Shih-Yu Ku, HsinChu, TW;
Wen-Chi Wang, HsinChu, TW;
Yi-Shu Chang, HsinChu, TW;
Chao-Cheng Lee, HsinChu, TW;
Assignee:
Realtek Semiconductor Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03G 7/00 (2006.01); H04B 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An audio converting device including a digital high-pass filter, an expander, a digital low-pass filter, a delta-sigma modulator, a digital-to-analog converter, an analog low-pass filter and a gain control unit is provided. The digital high-pass filter in this invention can filter out a direct-current component of digital audio data such that the production of noise is avoided when the volume is adjusted by users.