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:
Jul. 14, 2015
Filed:
Mar. 27, 2013
Mediatek Singapore Pte. Ltd., Singapore, SG;
MediaTek Singapore Pte. Ltd., Singapore, SG;
Abstract
A phase lock loop having a lock detector is provided. The lock detector is based on a replica charge pump and includes: a charge pump, a filter and a comparing circuit. The charge pump is arranged for providing an output according to a phase difference between an output signal and a reference signal. The filter is coupled to the charge pump, and is arranged for filtering the output of the charge pump to generate a filtered output voltage. The comparing circuit is coupled to the filter, and is arranged for comparing the filtered output voltage with a threshold setting to generate a lock indication signal to indicate whether the output signal is locked to the reference signal.