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:
May. 31, 1977
Filed:
Nov. 21, 1975
Applicant:
Inventors:
Kosei Nomiya, Tokyo, JA;
Tadao Kikuchi, Tokyo, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ; H03K / ;
U.S. Cl.
CPC ...
3072 / ; 307304 ; 361 10 ;
Abstract
An input gate circuit of a semiconductor integrated circuit composed of insulated gate field-effect transistors, comprises a driving transistor and a load transistor which form an inverter, a transistor which prevents the input of the integrated circuit from being opened, and resistance means to protect the transistors. A first resistance is connected in series between an input terminal and the gate of the driving transistor, while another resistance is connected between the input terminal and one end of the input opening preventing transistor whose other end is connected to a power supply terminal.