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:
Mar. 21, 1978
Filed:
Jun. 22, 1976
Applicant:
Inventors:
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3072 / ; 3072 / ; 307305 ;
Abstract
After a principal current through an SCR has been decreased to zero by inverting the polarity of the voltage between the main terminals of the SCR(anode voltage,) its gate is reversely biased with a gate bias pulse including a time point where the anode voltage passes through a zero point toward the positive direction. Also, the gate is reversely biased with a gate bias signal in the form of a direct current less in amplitude than the bias pulse. The bias signal may be in the form of a pulse consecutive to the bias pulse and terminating not earlier than the termination of the OFF-state voltage.