Self-tracking integrated differential termination resistance
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United States of America Patent
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Jul 8, 2003
Grant Date -
N/A
app pub date -
Jan 22, 2002
filing date -
Oct 3, 2001
priority date (Note) -
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Abstract
Method and circuitry for implementing an integrated differential termination resistance that is self-tracking. The invention employs a mechanism that automatically tracks variations on a number of circuit and signal parameters including input common-mode voltage, as well as varying device characteristics due to fluctuations in processing, power supply voltage and temperature. It then adjusts the resistance across the two differential input signals in a self-calibrating manner to obtain a substantially constant termination resistance for a given application.
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