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:
Jun. 21, 1977
Filed:
Jun. 22, 1976
Applicant:
Inventor:
Tadao Kikuchi, Tokyo, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307209 ; 307215 ; 307216 ; 3072 / ; 307244 ; 307236 ; 328 92 ; 328 95 ;
Abstract
In a three-state discernment circuit, a signal including alternately recurring logic 0 and 1 levels is applied to a predetermined terminal to be suitably processed for discerning three different states. The signal including the logic 0 and 1 levels is applied to the predetermined terminal through a high output impedance circuit, and predetermined gate circuits are discerned in accordance with a power source potential condition, an opened condition and a round potential condition of the predetermined terminal.