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:
Oct. 09, 2012
Filed:
Nov. 17, 2010
Chih Yen Wu, Science-Based Industrial Park Hsin-Chu, TW;
Chien Jung Huang, Science-Based Industrial Park Hsin-Chu, TW;
Hsiang Sheng Liu, Science-Based Industrial Park Hsin-Chu, TW;
Ching Chih Chen, Science-Based Industrial Park Hsin-Chu, TW;
Chih Yen Wu, Science-Based Industrial Park Hsin-Chu, TW;
Chien Jung Huang, Science-Based Industrial Park Hsin-Chu, TW;
Hsiang Sheng Liu, Science-Based Industrial Park Hsin-Chu, TW;
Ching Chih Chen, Science-Based Industrial Park Hsin-Chu, TW;
PixArt Imaging Inc., Hsin-chu, TW;
Abstract
A frequency calibration method for a programmable oscillator includes the steps of: counting an oversampling number of an oversampling signal and estimating an accumulated bit number of a USB data stream according to the oversampling signal; calculating a difference between the oversampling number and M times of the accumulated bit number when the accumulated bit number is larger than or equal to a predetermined value; and determining a frequency calibration step of the oversampling signal according to the difference. The present invention further provides a frequency calibration device for a programmable oscillator.