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:
Feb. 09, 1988
Filed:
Feb. 09, 1987
Mirza A Beg, Lima, OH (US);
Westinghouse Electric Corp., Pittsburgh, PA (US);
Abstract
A solid state switching circuit is provided with a first power sharing circuit which incorporates resistive power dissipation elements so that the required dissipated power is shared between a main power transistor and the power sharing circuit. A second power sharing circuit is connected in parallel with a portion of the first power sharing circuit and operates to provide additional resistive power dissipation under certain switch voltage conditions. The use of this second power sharing circuit permits an increase in the required trip time of the main switching transistor or improves the reliability of the power transistors in the main circuit and the first power sharing circuit by lowering transistor stress during transient conditions.