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. 09, 1996
Filed:
Aug. 08, 1994
Ana S Leon, Austin, TX (US);
Kin K Chau-Lee, Austin, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A lock detection circuit (112) includes a first sampler (113) which samples an input signal (102) at a rate of an output signal (109) to provide a sampled input signal. A second sampler (114) which samples a feedback signal (111) at the rate of the output signal (109) to provide a sampled feedback signal. The sampled input signal is subsequently sampled by a third sampler (115) at the rate of the feedback signal. The sampled feedback signal is subsequently sampled by a fourth sampler (116) at the rate of the input signal. The second sampled input signal and the second sampled feedback signal are subsequently compared (117) and when they substantially match, an indication (122) is set to indicate that phase and/or frequency lock has been obtained.