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:
Sep. 30, 1986
Filed:
Dec. 03, 1984
Franco Bertotti, Milan, IT;
Paolo Ferrari, Gallarate, IT;
Mario Foroni, Valeggio Sul Mincio, IT;
Sergio Garue, Peschiera Borromeo, IT;
SGS-ATES Componenti Elettronici S.p.A., Catania, IT;
Abstract
This controlled electronic switching device for the suppression of transients can change over from a non-conductive state to a conductive state at lower triggering current levels than conventional devices while retaining unaltered its response characteristics to variations in the voltage applied thereacross. The device comprises a main switch which is triggered by a parallel-connected auxiliary switch having smaller junction areas and a higher capacitive current shunt resistance (resistance between base and emitter) than the main switch, thereby it turns on at lower control currents from the gate electrode for a given response to voltage variations.