Patent ID: 11863245
Assignee: HITACHI ASTEMO, LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A signal transmission system comprising:
a first electronic device; and
a second electronic device connected to the first electronic device by a signal wiring,
wherein
the first electronic device includes:
a first communication unit that performs communication with the second electronic device via the signal wiring;
a first signal processing unit that performs signal processing related to the communication;
a first power supply unit that supplies direct current to the second electronic device via the signal wiring; and
a first filter circuit connected between the signal wiring and the first power supply unit,

the second electronic device includes:
a second communication unit that performs communication with the first electronic device via the signal wiring;
a second signal processing unit that performs signal processing related to the communication;
a second power supply unit that supplies power to the second communication unit and the second signal processing unit by using the direct current supplied from the first electronic device via the signal wiring; and
a second filter circuit connected between the signal wiring and the second power supply unit,

each of the first filter circuit and the second filter circuit includes a plurality of filters having frequency characteristics different from each other, and
the first signal processing unit acquires communication quality information indicating quality of the communication in at least two or more frequency bands, and determines a state of the first filter circuit and the second filter circuit based on the communication quality information.