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:
Jan. 01, 2008
Filed:
Apr. 21, 2006
Chih-wei Yang, Hsinchu, TW;
Chien-hsun Lee, Hsinchu, TW;
Hsiang-sheng Liu, Hsinchu, TW;
Juh-gua Shiau, Hsinchu, TW;
Chih-Wei Yang, Hsinchu, TW;
Chien-Hsun Lee, Hsinchu, TW;
Hsiang-Sheng Liu, Hsinchu, TW;
Juh-Gua Shiau, Hsinchu, TW;
Holtek Semiconductor Inc., Hsinchu, TW;
Abstract
An adjusting frequency device of built-in oscillator for USB interface and a method thereof are described. It is Auto detect the error of bit-rate between the USB host and the USB device, and produce tiny counting time for clocking the clock error between the USB host and the USB device by a delay lock loop. The clock error after quantification, digitization and operation outputting a quantitative code, then the oscillator adjusts the oscillation frequency according to the quantitative code. Whereby adjusting the oscillation frequency of the USB device and the frequency of the USB host to less than 1% clock error for ensuring the accuracy of data transmission.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile