POWER SWITCH CELL WITH ADAPTIVE BODY BIAS
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United States of America Patent
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Issued Date -
Sep 3, 2015
app pub date -
Sep 27, 2012
filing date -
Sep 27, 2012
priority date (Note) -
Abandoned
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Abstract
A circuit and a method are disclosed for adjusting a body bias voltage applied to a power gating switch. The circuit comprises: a first supply voltage (916), a body bias generator (918) formed from a plurality of series connected MOSFETs coupled to a second supply voltage (928) and an adaptive switch (910) providing an output coupled to either the first supply voltage or the body bias generator output (926), wherein the output of the adaptive switch is a first body bias voltage when coupled to the first supply voltage and is a second body bias voltage when coupled to the body bias generator output such that the first body bias voltage is greater than the second body bias voltage when configured as a gating header switch and the first body bias voltage is less than the second body bias voltage when configured as a gating footer switch.
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