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:
Jan. 24, 1984
Filed:
Aug. 06, 1981
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365104 ; 365203 ;
Abstract
A semiconductor read-only memory is constructed of first and second read-only memories of the ratioless type each of which includes a plurality of MISFETs connected in series, and a logic circuit which logically combines output signals of the first and second read-only memories. When the output of the first read-only memory is to be determined by an input signal level thereof, the second read-only memory is forcibly brought into a precharge state. As a result, even when an undesirable coupling capacitor exists between an output terminal of the first read-only memory and an output terminal of the second read-only memory, the signal from the first read-only memory can be provided at the proper level.