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:
Apr. 01, 1997
Filed:
Jan. 18, 1996
Applicant:
Inventor:
Takaki Kohno, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
36518521 ; 365207 ; 365208 ;
Abstract
In a semiconductor memory device including ROM cells, a digit line for receiving read data from a selected one of the at the memory cells, and a bias circuit for amplifying a voltage at the digit line, a differential amplifier, which has a positive phase input, a negative phase input, a positive phase output and a negative phase output, is provided. The positive phase input is connected to the output of the bias circuit. The negative phase output is connected to the negative phase input, thereby establishing a positive feedback loop in the differential amplifier.