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:
Jun. 16, 1998
Filed:
Dec. 12, 1995
Robert W Hulvey, Hermosa Beach, CA (US);
TRW Inc., Redondo Beach, CA (US);
Abstract
A digital color burst phase switch for determining phase shift of a color burst signal in a video signal includes a phase selector for selecting either a first reference clock or a second reference clock in response to a switch signal. A phase delay device delays the phase of either the first reference clock or the second reference clock selected by the phase selector to generate a third reference clock. A phase comparator compares the phase of the third reference clock to the phase of the color burst signal to generate a control signal. The control signal is integrated over substantially the entire color burst signal to generate an integration value. This integration value is compared to a threshold value in a threshold device to generate a correction signal. A switch generator generates the switch signal in response to the correction signal such that the phase selector selects either the first reference clock or the second reference clock having a phase substantially corresponding to the phase of the color burst signal.