Method and apparatus for suppressing ringing in controller area network (can) bus
AssigneeMicrochip Technology Incorporated
InventorsDeclan Jordan, David Gammie
Life of this patent
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Abstract
A circuit to suppress ringing in a Controller Area Network (CAN) bus having a CAN high (CANH) wire and a CAN low (CANL) wire is provided. The circuit may include processing circuitry to generate a CAN control signal, and a transconductance amplifier to receive a first input signal corresponding to the CAN control signal and a voltage signal from the CANL wire, and to generate an output current signal based on a difference between the first input signal and the voltage signal from the CANL wire. An output terminal of the transconductance amplifier may be coupled to the CANH wire to source current to or sink current from the CANH wire.
Claims16
A circuit to suppress ringing in a Controller Area Network (CAN) bus having a CAN high (CANH) wire and a CAN low (CANL) wire, the circuit comprising:
- processing circuitry to generate a CAN control signal;
- and
- a transconductance amplifier to receive a first input signal corresponding to the CAN control signal and a voltage signal from the CANL wire, and to generate an output current signal based on a difference between the first input signal and the voltage signal from the CANL wire;
- wherein an output terminal of the transconductance amplifier is coupled to the CANH wire to source current to or sink current from the CANH wire.
A method of suppressing ringing in a Controller Area Network (CAN) bus having a CAN high (CANH) wire and a CAN low (CANL) wire, the method comprising:
- generating a CAN control signal;
- receiving a first input signal corresponding to the CAN control signal and a voltage signal from the CANL wire;
- generating an output current signal based on a difference between the first input signal and the voltage signal from the CANL wire;
- and
- sourcing current to or sinking current from the CANH wire based on the output current signal.
Dependencies are inferred from the claim text.