System and method for providing a frequency dependent synthetic termination
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United States of America Patent
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Nov 6, 2001
Grant Date -
N/A
app pub date -
Mar 16, 1998
filing date -
Dec 11, 1997
priority date (Note) -
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Abstract
A frequency dependent synthetic termination system varies a simulated impedance of a communications device as a function of signals received by the communications device. A feedback mechanism receives signals from a transmission line and attenuates the signals when the signals have a frequency within a predefined frequency range. The feedback mechanism then transmits the signals to a current source which drives the transmission line, thus simulating a termination impedance of the communications device based on the signals transmitted from the feedback mechanism. By varying the impedance of the communications device, the communications device can be designed to support communications of various frequencies over the transmission line.
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