Mismatch and noise insensitive sense amplifier circuit for STT MRAM
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United States of America Patent
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Apr 4, 2017
Grant Date -
Sep 15, 2016
app pub date -
May 24, 2016
filing date -
Feb 24, 2015
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Abstract
A technique for sensing a data state of a data cell. A comparator has a first input at a node A and a second input at a node B. A first n-channel transistor is connected to a first p-channel transistor at the node A. A second n-channel transistor is connected to a second p-channel transistor at the node B. A multiplexer is configured to selectively connect a first reference cell or the data cell to the first n-channel transistor and configured to selectively connect the data cell or a second reference cell to the second n-channel transistor. The comparator outputs the data state of the data cell based on input of a node A voltage at the node A and a node B voltage at the node B.
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