Self-adjusting regulation current for memory array source line
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United States of America Patent
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Jun 14, 2016
Grant Date -
Aug 13, 2015
app pub date -
Feb 7, 2014
filing date -
Feb 7, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
To maintain stability of memory array operations, a supplemental current can supply a common source line of a memory array so that the combined current from the memory array and supplemental current is at least a minimum regulation current level. When enabled for sensing operations, a driver circuit maintains the common source line's voltage level. A current subtractor circuit determines the difference between a reference current and a current proportional to the current flowing from the array, where the reference current is proportional to the minimum regulation current. The difference current is then mirrored by a self-adjusting current loop and supplied to the common source line to maintain its current level.
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