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:
Apr. 23, 2013
Filed:
Dec. 05, 2011
Ching-cheng Wu, Hsinchu, TW;
Chih-yu Chuang, Hsinchu, TW;
Ching-Cheng Wu, Hsinchu, TW;
Chih-Yu Chuang, Hsinchu, TW;
Skymedi Corporation, Hsinchu, TW;
Abstract
The present invention is directed to a clock generator and a method of generating a clock signal. A digital control oscillator (DCO) generates a clock signal. A first frequency calibration unit extracts a periodic signal and determines a frequency error quantity between the extracted periodic signal and a derived clock signal. A second frequency calibration unit generates a coarse tuning signal when an absolute value of the frequency error quantity is greater than a first predetermined threshold, and generates a fine tuning signal when the absolute value of the frequency error quantity is less than a second predetermined threshold.