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:
Dec. 03, 1996
Filed:
Jan. 19, 1993
Applicant:
Inventors:
Noriyoshi Urushiwara, Katsuta, JP;
Noboru Sugiura, Mito, JP;
Assignee:
Hitachi, Ltd., , JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02P / ;
U.S. Cl.
CPC ...
307 106 ; 307 101 ; 123630 ; 361118 ;
Abstract
A switching circuit for an electronic distributor ignition device for an internal combustion engine. Current flowing through the primary ignition coil is controlled by a semiconductor switch circuit connected between the coil and ground. A control input to the semiconductor switch is also connected to ground by a pair of oppositely poled zener diodes which have a temperature coefficient which approximates that of the semiconductor switch circuit.