Transceiver
AssigneeRealtek Semiconductor Corp.
InventorChien Wen Chen
Life of this patent
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Abstract
A transceiver includes a first digital-to-analog converter (DAC), a second DAC, and a timing control module. In a calibration mode, the first DAC transmits a transmitting signal; the second DAC transmits an echo cancellation signal; and the timing control module, according to an echo signal of the transmitting signal and the echo cancellation signal, obtains a timing offset therebetween, and generates a first timing control signal and a second timing control signal to the first DAC and the second DAC according to the timing offset, respectively. The first DAC adjusts a transmission delay of transmitting the transmitting signal according to the first timing control signal, and/or the second DAC modifies a transmission delay of transmitting the echo cancellation signal according to the second timing control signal.
Claims20
A transceiver, comprising:
- a first digital-to-analog converter, configured to output a transmitting signal in a calibration mode;
- a second digital-to-analog converter, configured to output an echo cancellation signal in the calibration mode;
- and
- a timing control module, in the calibration mode, configured to obtain a timing offset between an echo signal of the transmitting signal and the echo cancellation signal in the timing control module according to the echo signal and the echo cancellation signal, and generate a first timing control signal and a second timing control signal to the first digital-to-analog converter and the second digital-to-analog converter, respectively, according to the timing offset,
- wherein the first digital-to-analog converter adjusts a transmission delay of transmitting the transmitting signal according to the first timing control signal, and/or the second digital-to-analog converter adjusts a transmission delay of transmitting the echo cancellation signal according to the second timing control signal.
A transceiver, comprising:
- a first digital-to-analog converter, configured to output a first signal and a second signal in a calibration mode;
- and
- a timing control module, comprising:
- a time-to-digital converter, configured to obtain a first time digital signal and a second time digital signal according to the first signal and the second signal in the calibration mode;
- and
- a controller, configured to obtain a first timing offset between the first signal and the second signal in the timing control module according to the first time digital signal and the second time digital signal, and adjust a transmission delay of the first digital-to-analog converter transmitting the first signal and a transmission delay of the first digital-to-analog converter transmitting the second signal according to the first timing offset to reduce the first timing offset.
Dependencies are inferred from the claim text.