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. 22, 1981
Filed:
Jun. 27, 1979
Charles P Carinalli, Sunnyvale, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A transistor, used in the switching of current in an inductive load, is protected by a similar transistor connected between collector and base. The protective transistor has a lower breakdown voltage than the transistor being protected. When the inductive load produces a voltage surge, the protective transistor breaks down first and turns the protected transistor on so that the surge is absorbed in an active transistor not in breakdown and therefore capable of dissipating the surge without damage. Since the surge is arrested at high voltage the time required to complete the arrest is shortened.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile