Active resistive summer for a transformer hybrid
First Claim
Patent Images
1. A transmit canceller comprising:
- an amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal;
a feedback element in communication with the second polarity input terminal and the output terminal;
a first input resistor in communication with the second polarity input terminal and a composite signal that is based on a near end transmission signal and a received signal from a far end;
a second input resistor in communication with the second polarity input terminal and a replica transmitter signal; and
a voltage source in communication with the first polarity input terminal,wherein the received signal is output by the output terminal.
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Abstract
A transmit canceller comprises an amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal. A feedback element communicates with the second polarity input terminal and the output terminal. A first input resistor communicates with the second polarity input terminal and a composite signal that is based on a near end transmission signal and a received signal from a far end. A second input resistor communicates with the second polarity input terminal and a replica transmitter signal. A voltage source communicates with the first polarity input terminal. The received signal is output by the output terminal.
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Citations
17 Claims
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1. A transmit canceller comprising:
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an amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal; a feedback element in communication with the second polarity input terminal and the output terminal; a first input resistor in communication with the second polarity input terminal and a composite signal that is based on a near end transmission signal and a received signal from a far end; a second input resistor in communication with the second polarity input terminal and a replica transmitter signal; and a voltage source in communication with the first polarity input terminal, wherein the received signal is output by the output terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for providing a transmit canceller comprising:
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providing an amplifier having a first polarity input terminal, a second polarity input terminal, and an output terminal; feeding back the output terminal to the second polarity input terminal; supplying a composite signal comprising a near end transmission signal and a received signal from a far end to a first input resistor that communicates with the second polarity input terminal; supplying a replica transmitter signal via a second input resistor to the second polarity input terminal; and supplying a predetermined voltage to the first polarity input terminal, wherein the received signal is output by the output terminal of the operational amplifier. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification