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. 06, 1988
Filed:
Feb. 12, 1987
Applicant:
Inventors:
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H01L / ;
U.S. Cl.
CPC ...
307315 ; 307300 ; 357 46 ;
Abstract
An additional p-n junction diode, having a forward bias voltage smaller than a forward bias voltage between the base and emitter of a first-stage specific transistor of 3-stage Darlington connected npn transistors, is electrically connected in parallel between a p-type base layer and an n-type collector layer of the specific transistor. The polarities of the p-type and n-type layers of the diode are respectively the same as those of the parallel-connected p-type base and n-type collector layers of the specific transistor.