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. 21, 2020
Filed:
Sep. 06, 2018
Anpec Electronics Corporation, Hsinchu, TW;
Yuan-Hung Wang, Miaoli County, TW;
Jing-Min Chen, Hsinchu, TW;
ANPEC ELECTRONICS CORPORATION, Hsinchu, TW;
Abstract
A fast-locking phase locked loop and a fast locking method are provided. The fast locking method includes dividing a frequency of an oscillation signal by a preset divisor to output a divided signal, detecting a frequency difference between the divided signal and a reference signal, tracking whether a divided frequency of the divided signal falls within a locked frequency range or not, if not, tracking the divided frequency, and if yes, locking the divided frequency, detecting a divided phase difference between a divided phase of the divided signal and a reference phase of the reference signal, recording the phase difference as a tracking reference phase difference, tracking a next divided phase according to the tracking reference phase difference, and determining whether the divided phase falls within a locked phase range, and if not, tracking the divided phase, and if yes, locking the divided phase.