Sense amplifier
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United States of America Patent
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-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Mar 29, 1990
filing date -
Mar 29, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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