Adaptive cancellation bridge circuit
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United States of America Patent
Stats
-
Jun 2, 1987
Grant Date -
N/A
app pub date -
Apr 22, 1985
filing date -
Feb 21, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to an adaptive cancellation bridge circuit (ACB) for use in a single medium full duplex line termination equipment such as modems where signals are transmitted and received simultaneously along a pair of wires, the transmit and receive signal being separated in frequency. The bridge comprises a bridge network including transconductance cells (TC1, TC2 and TC3), to provide resistive, capacitive, and inductive components and these cells are electronically controlled by a current control device CC driven from a received signal (RXS) inphase and quadrature components to adjust the bridge network so that it becomes balanced and cancels a transmit signal (TXB) completely.
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