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:
Nov. 25, 2014
Filed:
Mar. 06, 2013
Mediatek Singapore Pte. Ltd., Singapore, SG;
Wen-Chang Lee, Taipei, TW;
Ping-Ying Wang, Hsinchu, TW;
MediaTek Singapore Pte. Ltd., Singapore, SG;
Abstract
A calibration device arranged for calibrating an oscillating frequency of an oscillator includes: a phase locking device arranged to track a first reference clock generated by the oscillator until a feedback clock is phase-aligned with the first reference clock, and then arranged to track a second reference clock generated by the oscillator until a phase difference between the second reference clock and the feedback clock is a static phase difference, wherein the feedback clock is generated by dividing an output oscillating signal of the phase locking device by a divisor; an adjusting circuit arranged to adjust the divisor into an updated divisor to reduce the static phase difference between the second reference clock and the feedback clock; and a calibrating circuit arranged to calibrate the oscillating frequency of the oscillator according to the updated divisor, wherein the second reference clock is generated by varying a control signal of the oscillator.