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. 26, 1988
Filed:
Jun. 27, 1986
Applicant:
Inventor:
James H Wharton, Indianapolis, IN (US);
Assignee:
RCA Corporation, Princeton, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 21 ; 315411 ; 358190 ;
Abstract
A power supply for a video display apparatus includes circuitry that produces a pulse width modulated signal in response to the selected horizontal deflection rate. The pulse width modulated signal controls the switching of an FET through a transformer to provide a load circuit operating voltage representative of the deflection frequency. A turn-off signal for the FET is provided to a turn-off transistor from the primary winding of the transformer to insure rapid turn off of the FET.