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:
Nov. 13, 1990
Filed:
Sep. 07, 1988
Applicant:
Inventor:
Larry D Johnson, Kingsport, TN (US);
Assignee:
North American Philips Corp., New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358183 ; 358 22 ; 358149 ;
Abstract
The write clock controlling operation of the PIP circuitry (e.g. the analog digital converter in the PIP channel) utilizes a clock signal source having a substantially higher frequency (preferably six times) the desired write clock frequency. This clock signal is applied to a divide by six circuit which has a cycle reset controlled by the horizontal synchronization signal of the incoming PIP signal. The write clock signal furnished by this arrangement has the correct rate for sampling the incoming PIP video information and is pseudo line locked to the PIP horizontal synchronization signal.