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. 03, 2006
Filed:
Oct. 06, 2004
Woo-seok Kim, Suwon-si, KR;
Phil-jae Jeon, Osan-si, KR;
Woo-Seok Kim, Suwon-si, KR;
Phil-Jae Jeon, Osan-si, KR;
Abstract
A phase-locked loop circuit including a lock detection function is disclosed. The phase-locked loop circuit comprises a lock detection circuit. The lock detection circuit includes a lock-detection-start-signal generator, a lock-detection-clock generator, and a lock-detection-signal generator. The lock-detection-start-signal generates a lock detection start signal when the pulse width of an up signal and a down signal reaches a predetermined value. The lock-detection-clock generator generates a lock detection clock signal on the basis of the up signal and the down signal. The lock-detection-signal generator counts the lock detection clock signal, and generates the lock detection signal. The phase-locked loop circuit is capable of discriminating the operating regions thereof and outputting a lock detection signal when the locking of phase is completed.