Transceiver loopback data path
AssigneeXilinx, Inc.
InventorsWenfeng Zhang, Parag Upadhyaya
Life of this patent
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Abstract
A transceiver circuit is disclosed. The transceiver circuit includes a transmitter driver circuit configured to drive a transmit antenna. The transceiver circuit also includes a receiver circuit configured to generate digital signals based on received signals. The transceiver circuit also includes a loopback data path circuit electrically connected to the transmitter driver circuit and to the receiver circuit, where the loopback data path circuit is configured to conditionally provide signals from the transmitter driver circuit to the receiver circuit according to one or more control signals. The transceiver circuit also includes a controller configured to generate the control signals.
Claims20
A transceiver circuit, comprising:
- a transmitter driver circuit configured to drive a transmit antenna;
- a receiver circuit configured to generate digital signals based on received signals;
- a transmitter termination and electrostatic discharge (ESD) protection circuit connected between the transmitter driver circuit and an output node configured to be connected to the transmit antenna;
- a loopback data path circuit electrically connected to the transmitter driver circuit through the transmitter termination and ESD protection circuit at a connection point between the transmitter driver circuit and the output node, and electrically connected to the receiver circuit, wherein the loopback data path circuit is configured to conditionally provide signals from the transmitter driver circuit to the receiver circuit according to one or more control signals;
- and
- a controller configured to generate the one or more control signals.
A method of using a transceiver circuit, the transceiver circuit comprising a transmitter driver circuit configured to drive a transmit antenna, a receiver circuit configured to generate digital signals based on received signals, a termination and electrostatic discharge (ESD) protection circuit, a loopback data path circuit, and a controller, the method comprising:
- with the transmitter driver circuit, generating test signals based on test data signals;
- with the controller, generating a first set of control signals, wherein the first set of control signals cause the loopback data path circuit to provide loopback test signals to the receiver circuit from a node between first and second series inductors of the termination and ESD protection circuit based on the test signals of the transmitter driver circuit;
- and
- with the receiver circuit, generating the digital signals based on the loopback test signals.
A method of using a transceiver circuit, the transceiver circuit comprising a transmitter driver circuit configured to drive a transmit antenna, a receiver circuit configured to generate digital signals based on received signals, a loopback data path circuit and a controller, the method comprising:
- with the transmitter driver circuit, generating signals based on data signals through a signal path that includes the loopback data path circuit, wherein the loopback data path circuit is electrically connected to the transmitter driver circuit through a termination and electrostatic discharge protection circuit at a connection point between the transmitter driver circuit and an output node and providing the signals through the output node to the transmit antenna;
- and
- with the controller, generating a first set of control signals, wherein the first set of control signals cause at least a portion of the loopback data path circuit to be electrically isolated from the transmitter driver circuit.
Dependencies are inferred from the claim text.