Reduction of data dependent power supply noise when sensing the state of a memory cell
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United States of America Patent
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Oct 15, 2002
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N/A
app pub date -
Mar 8, 2001
filing date -
May 1, 2000
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Abstract
A logic level detection circuit that includes a sense amplifier and a consumption equilibration circuit that is topologically distinct from the sense amplifier and that reduces and/or substantially eliminates data dependent electrical consumption by having a data dependent electrical consumption that compensates the data dependent electrical consumption of the sense amplifier. The sense amplifier may be implemented as a current-sensing sense amplifier, and the consumption equilibration circuit may be implemented as a selectively enabled current source that is responsive to a signal generated by the current-sensing sense amplifier. The consumption equilibration circuit may be implemented with a small number of transistors and in a small chip area compared to the number of transistors and chip area used for implementing the sense amplifier.
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