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. 30, 1992
Filed:
Jul. 06, 1990
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ; H03K / ;
U.S. Cl.
CPC ...
307454 ; 307455 ; 307475 ;
Abstract
A unitary semiconductor integrated circuit is constructed using a non-threshold logic NTL circuit for a circuit which has a light load or a light load driving capability, using an NTL circuit additionally provided with an emitter-follower output circuit for effecting a circuit having a comparatively heavy load, and using a super pull-down logic (SPL) circuit for effecting a circuit having a heavy load. The NTL circuit thereof which receives an output signal generated by the emitter-follower output circuit or from the SPL circuit associated with a preceding logic gate circuit stage uses, as its operating voltage, the operating voltage of the emitter-follower output circuit or that of the SPL circuit.