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. 23, 1986
Filed:
Jan. 23, 1985
Masayuki Kokado, Kawasaki, JP;
Hidezi Sumi, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor device comprises an internal circuit and an electrostatic destruction preventing circuit connected between a predetermined electrical potential point and a signal input terminal with respect to the internal circuit. The electrostatic destruction preventing circuit comprises a PNP-transistor having its emitter connected to the predetermined electrical potential point, an NPN-transistor having its emitter connected to said signal input terminal and said internal circuit, collector connected to the base of the PNP-transistor, and base connected to the collector of said PNP-transistor, and a resistor connected between the base of the PNP-transistor and the base of the NPN-transistor.