PCM memory with margin current addition and related methods
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United States of America Patent
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May 9, 2017
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app pub date -
Aug 2, 2016
filing date -
Aug 2, 2016
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Abstract
A differential PCM memory may include first and second PCM elements, and a sense amplifier circuit configured to sense a difference between first and second sense currents passing through the first and second PCM elements, respectively, during a sense operation. The differential PCM memory may include a first margin current branch coupled in parallel with the first PCM element and configured to selectively add a first margin current to the first sense current, and a second margin current branch coupled in parallel with the second PCM element and configured to selectively add a second margin current to the second sense current.
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