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. 29, 1991
Filed:
Sep. 13, 1989
Applicant:
Inventors:
Satoru Kishida, Hyogo, JP;
Hisashi Matsumoto, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365208 ; 307530 ;
Abstract
In a read only memory, a current type sense amplifiers connected to an array of memory cells includes a charge supply circuit for maintaining an output voltage of an inverter. At the time of first accessing, when the input node is brought to temporarlly increased potential level by the delay at the inverter, the node is maintained at a predetermined potential level by the operation of the circuit. In this manner, the time until the node is changed to the high level at the time of second accessing may be shortened. That is, the operating speed of the sense amplifier is increased.