System including adaptive power rails and related method
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United States of America Patent
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Apr 23, 2013
Grant Date -
Mar 15, 2012
app pub date -
Mar 28, 2011
filing date -
Sep 9, 2010
priority date (Note) -
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Abstract
According to one disclosed embodiment, an adaptive voltage rail circuit for integrating low voltage devices with high voltage analog circuits is described. This adaptive voltage rail circuit includes a high voltage analog circuit having a common mode voltage. Further included is a first voltage rail having a first rail voltage which is based on and greater than the common mode voltage of the high voltage analog circuit. A second voltage rail having a second rail voltage which is based on and less than the same common mode voltage is also present. By connecting these first and second voltage rails across at least one low voltage device, an adaptive voltage rail circuit is able to safely integrate low voltage devices with high voltage analog circuits in the same system.
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