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:
Oct. 01, 1991
Filed:
Apr. 17, 1990
Applicant:
Inventor:
Yutaka Harada, Tokyo, JP;
Assignee:
Research Development Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307464 ; 307201 ; 307455 ;
Abstract
In a threshold logic circuit, digital input signals are weighted and summed up and then the sum of weighted digital signals is compared with a threshold value. The threshold logic circuit comprises a plurality of current switching circuits and means for summing up the output currents from the current switching circuit. The weights for the input signals are changed by controlling supply currents to the current switching circuits.