Impedance and duty cycle calibration in a driver circuit and a receiver circuit
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United States of America Patent
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Jul 5, 2016
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N/A
app pub date -
Jul 27, 2015
filing date -
Jul 27, 2015
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Abstract
Some of the embodiments of the present disclosure provide a method including: communicating, by a first pin of an integrated circuit, with a device over a communication link, wherein the first pin is associated with a first impedance; selecting a plurality of impedance values for the first impedance; for ones of the plurality of impedance values, (i) transmitting a corresponding digital signal from the first pin over the communication link and (ii) generating a corresponding signal eye opening for the corresponding digital signal, such that a plurality of signal eye openings corresponding to a plurality of digitals signals for the corresponding plurality of impedance values are generated; comparing the plurality of signal eye openings; selecting a first impedance value of the plurality of impedance values; and transmitting signals over the communication link, with the first impedance being tuned to the first impedance value.
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