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:
Jul. 09, 1991
Filed:
Mar. 29, 1990
Applicant:
Inventor:
Andrew M Lever, Old Woking, GB;
Assignee:
Hughes Microelectronics Limited, Glenrothes, GB;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365185 ; 36518905 ; 36518907 ; 365205 ; 365208 ; 365210 ;
Abstract
A sense amplifier for determining the logic state of a memory cell consists of a switch transistor (N2) for receiving current during sensing from the memory cell (NV1), a nonvolatile transistor (NV2) providing a reference current which is compared to a representation of the sensed current through the switch transistor (itself dependent on the state of NV1), a bistable latch (N4P4, N5P5) which is switched into one or other of its states depending on the result of the comparison, and a feedback from the output of the latch (NODE 3) to the gate of the switch transistor (N2) to isolate the amplifier from the memory cell after sensing.