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:
Mar. 22, 1994
Filed:
Oct. 14, 1992
Applicant:
Inventors:
Yoshihiro Tada, Kyoto, JP;
Hiromi Uenoyama, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36523001 ; 365185 ; 365201 ;
Abstract
A PROM IC including sense circuits, each including a sense amplifier. A pull-up resistor circuit whose resistance value is variable is provided on the side of an input of the sense amplifier so that, upon a reception of a test selection signal, the resistance value of the resistor circuit is changed to a value with which a drive condition of current flowing through a selected memory cell becomes severe.