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. 09, 1996
Filed:
Oct. 06, 1994
Hyun S Jang, Bubaleub, KR;
Gyu T Hwang, Bubaleub, KR;
Abstract
A phase locked loop circuit comprising a first counter for dividing a reference frequency at a division ratio predetermined or determined by an input unit, a second counter for dividing a frequency of an output signal from the phase locked loop circuit at a division ratio predetermined or determined by a different input unit, a phase detector for inputting output signals from the first and second counters and generating a voltage based on a phase difference between the inputted signals, a low pass filter for low pass filtering an output signal from the phase detector, and a voltage controlled oscillator for generating a frequency signal proportioned to an output voltage from the low pass filter. The phase locked loop circuit further comprises an unlock detector for generating a control signal for synchronization of one of the first and second counters with an earlier phase in response to an unlocked signal from the phase detector.