On-die input reference voltage with self-calibrating duty cycle correction
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United States of America Patent
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Jul 18, 2017
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N/A
app pub date -
Aug 12, 2011
filing date -
Aug 12, 2011
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Abstract
A buffer circuit with an adjustable reference voltage is presented. The buffer circuit with adjustable reference voltage has an input buffer circuit that is connected to a data input and a reference voltage. The output of the input buffer circuit is connected an eye monitor circuit that generates a transition signal based on a number of transitions of an output of the input buffer circuit. The output from the eye monitor circuit is that processed by a calibration control circuit that transmits a selection signal to a multiplexer. The multiplexer selects a level of the reference voltage based on the selection signal from the calibration control circuit.
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