US 12,520,440 B2 · Communication device and communication apparatus

Abstract

A communication device (relay device) is attached to a vehicle power supply apparatus, and receives a differential signal represented by a voltage difference between two electrical signals respectively propagating through two conductive wires included in a communication line. The signal processing circuit removes noise from the two electrical signals using an electric potential of a first conductor as a reference electric potential. The signal conversion unit converts the differential signal represented by the voltage difference between the two electrical signals from which noise has been removed, into a voltage signal represented by a voltage whose reference electric potential is an electric potential of a second conductor. The power supply circuit of the power supply apparatus applies a voltage whose reference electric potential is the electric potential of the second conductor to the signal conversion unit via the apparatus connector connected to the power supply apparatus.

Claims16

Dependent claims

A communication device configured to be attached to an in-vehicle apparatus and receive a differential signal represented by a voltage difference between two electrical signals respectively propagating through two conductive wires, the communication device comprising:

a noise removal circuit configured to remove noise from the two electrical signals using an electric potential of a first conductor as a reference electric potential;
a signal conversion unit configured to convert a differential signal represented by a voltage difference between the two electrical signals from which the noise removal circuit has removed noise, into a voltage signal represented by a voltage whose reference electric potential is an electric potential of a second conductor;
and
an apparatus connector configured to be connected to a power supply apparatus for supplying power,
wherein the power supply apparatus supplies power to the signal conversion unit by applying a voltage whose reference electric potential is the electric potential of the second conductor to the signal conversion unit via the apparatus connector.

2 more elements

A communication apparatus comprising:

a communication device configured to receive a differential signal represented by a voltage difference between two electrical signals respectively propagating through two conductive wires;
and
a vehicle power supply apparatus to which the communication device is to be attached and that is configured to supply power to the communication device,
wherein the communication device includes:
a noise removal circuit configured to remove noise from the two electrical signals using an electric potential of a first conductor as a reference electric potential;
a signal conversion unit configured to convert a differential signal represented by a voltage difference between the two electrical signals from which the noise removal circuit has removed noise, into a voltage signal represented by a voltage whose reference electric potential is an electric potential of a second conductor;
and
an apparatus connector configured to be connected to the power supply apparatus, and
the power supply apparatus has a power supply circuit configured to supply power to the signal conversion unit by applying a voltage whose reference electric potential is the electric potential of the second conductor to the signal conversion unit via the apparatus connector.

6 more elements

Dependencies are inferred from the claim text.

Communication device and communication apparatus

Life of this patent

Communication device and communication apparatus

Life of this patent

Abstract

Claims16