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US 2022/0149851 A1Published application
System for and method of cancelling a transmit signal echo in full duplex transceivers
AssigneeAvago Technologies International Sales Pte. Limited
InventorsJingguang Wang, Jing Wang, Robert Roze, Kambiz Vakilian
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Abstract
The systems and methods discussed herein utilized a wireless or wired transceiver having a transmitter and a receiver. The transceiver is configured to reduce distortion contributions associated with echo cancelling. The transmitter provides a replica signal and a transmit signal. The replica signal and the transmit signal can be provided using a common switch.
Claims20
A transmitter, comprising:
- a first digital-to-analog converter circuit disposed on substrate;
- a second digital-to-analog converter circuit disposed on the substrate;
- and
- an active circuit dispose on the substrate for the first digital-to-analog converter circuit and the second digital-to-analog converter circuit, the active circuit having a common switch for the first digital-to-analog converter circuit and the second digital-to-analog converter circuit, wherein the second digital-to-analog converter circuit is configured to provide a replica signal for echo cancelling.
1 more element
A method, comprising:
- providing a digital input to a first digital-to-analog converter circuit disposed on substrate and a second digital-to-analog converter circuit disposed on the substrate;
- switching an active circuit disposed on the substrate for the first digital-to-analog converter circuit and the second digital-to-analog converter circuit using the digital input to provide a transmit signal and a replica signal, wherein the first digital-to-analog converter circuit and the second digital-to-analog converter circuit share a switch in the active circuit;
- and
- providing the replica signal to a summer for echo cancelling.
1 more element
A transceiver, comprising:
- a transmitter, comprising:
- a first digital-to-analog passive circuit comprised of first passive elements;
- a second digital-to-analog passive circuit comprised of second passive elements;
- and
- switches for the first digital-to-analog passive circuit and the second digital-to-analog passive circuit, the switches comprises a common switch for the first digital-to-analog passive circuit and the second digital-to-analog passive circuit, wherein the second digital-to-analog passive circuit is configured to provide a replica signal and the first digital-to-analog passive circuit is configured to provide a transmit signal;
- a summer coupled to the transmitter;
- and
- a receiver.
5 more elements
Dependencies are inferred from the claim text.