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:
Nov. 02, 1993
Filed:
Mar. 27, 1992
Akira Baba, Shizuoka, JP;
Masayuki Saito, Shizuoka, JP;
Masaaki Katsumata, Shizuoka, JP;
Shigemi Endo, Shizuoka, JP;
Yazaki Corporation, Tokyo, JP;
Abstract
A LTQ (light triggered & quenched) static induction thyristor circuit of the present invention is to provide a LTQ static induction thyristor circuit obtaining an excellent dv/dt capability and operating ambient temperature characteristics, a large optically controllable current capability, and simple structure. A main static induction thyristor turns on when its gate receives an optically triggering pulse and causes a current to flow through a load from a positive terminal of a power supply. A photothyristor turns on when its gate receives an optically quenching pulse and causes the gate to a negative power supply voltage to turn off. At this point, a first resistor functions in such a manner as to hold turned on for a predetermined time period even after application of has been ended. By the flow of such current through a first resistor, the gate is biased to a negative voltage.