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:
Feb. 28, 1995
Filed:
Dec. 07, 1993
Applicant:
Inventor:
Yasuhiro Hotta, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365 94 ; 365103 ; 365104 ; 365210 ;
Abstract
In a mask ROM, for each of the memory cell groups, a load circuit connected to data lines for the respective memory cell group, a sense amplifier, and a switching circuit are provided. The switching circuit selectively connects one of the data lines which are simultaneously selected, to the sense amplifier. A data line for a dummy memory cell is also connected to the sense amplifier.