Patent ID: 8254490

Claim:
A transceiver that simultaneously transmits a transmit signal and receives a receive signal, comprising: a transmit DAC generating the transmit signal based on a transmit digital signal stream, the transmit DAC comprising a plurality of transmit DAC circuit elements, and a plurality of transmit DAC switches that control which of the plurality of transmit DAC circuit elements contribute to generating the transmit signal; an echo cancellation DAC generating an echo cancellation signal based on the transmit digital signal stream, the echo cancellation DAC comprising a plurality of echo cancellation DAC circuit elements, and a plurality of echo cancellation DAC switches that control which of the plurality of echo cancellation DAC circuit elements contribute to generating the echo cancellation signal; a data controller that receives the transmit digital signal stream, and controls both the plurality of transmit DAC switches and the plurality of echo cancellation DAC switches; and a canceller for cancelling at least a portion of the receive signal by summing the echo cancellation signal with the receive signal.