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:
May. 28, 2002
Filed:
Feb. 28, 2001
David R. Deam, San Ramon, CA (US);
Electric Power Research Institute, Inc., Palo Alto, CA (US);
Abstract
A circuit that includes a silicon-controlled rectifier and a silicon-controlled rectifier gate trigger circuit connected to the silicon-controlled rectifier. A snubber capacitor is connected to the silicon-controlled rectifier and the silicon-controlled rectifier gate trigger circuit. The snubber capacitor generates a snubber capacitor voltage during an off state of the silicon-controlled rectifier. The snubber capacitor voltage thus developed is then used to power the silicon-controlled rectifier gate trigger circuit. The circuit also includes a resister-zener diode circuit connected to the snubber capacitor and an auxiliary capacitor. The auxiliary capacitor is charged through the resister-zener diode circuit by the snubber capacitor voltage. A voltage regulator is connected between the auxiliary capacitor and the silicon-controlled rectifier gate trigger circuit for providing a regulated voltage.