Precision differential level shifter
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United States of America Patent
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Apr 13, 2010
Grant Date -
Sep 13, 2007
app pub date -
Mar 6, 2006
filing date -
Mar 6, 2006
priority date (Note) -
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Abstract
A differential level shifter employs a variable current mirror to maintain a reference voltage at one output while the other output follows a differential input. Resistor networks allow postproduction trimming of load resistors and the current mirror, resulting in a precise and accurate output of the differential signal. An active cascode circuit enhances current mirror balance and high frequency operation.
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