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:
Jul. 27, 1982
Filed:
Feb. 12, 1981
Applicant:
Inventors:
Mark A Rosswurm, Ada, OH (US);
Joseph M Urish, Shawnee Township, Allen County, OH (US);
Assignee:
Westinghouse Electric Corp., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 56 ; 363132 ; 363134 ;
Abstract
A transistor current sensing circuit is provided for a power output transistor whose drive circuit includes a current controlled feedback transformer that has a current limited direct current source connected to the secondary winding of the transformer wherein the change in voltage level of the secondary winding upon the completion of turn-off of the output transistor is used as a signal to initiate turn-on of another associated transistor.