US 11,863,245 B2
Signal transmission device and signal transmission system
Yutaka Uematsu, Tokyo (JP); and Hideyuki Sakamoto, Tokyo (JP)
Assigned to Hitachi Astemo, Ltd., Hitachinaka (JP)
Appl. No. 17/928,322
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 26, 2021, PCT No. PCT/JP2021/007456
§ 371(c)(1), (2) Date Nov. 29, 2022,
PCT Pub. No. WO2021/261014, PCT Pub. Date Dec. 30, 2021.
Claims priority of application No. 2020-107187 (JP), filed on Jun. 22, 2020.
Prior Publication US 2023/0216540 A1, Jul. 6, 2023
Int. Cl. H04B 3/54 (2006.01); H04B 3/21 (2006.01); H04B 3/46 (2015.01)
CPC H04B 3/54 (2013.01) [H04B 3/21 (2013.01); H04B 3/46 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A signal transmission device comprising:
a communication unit that is connected to an electronic device by a signal wiring and performs communication with the electronic device via the signal wiring;
a signal processing unit that performs signal processing related to the communication;
a power supply unit that supplies direct current to the electronic device via the signal wiring; and
a filter circuit connected between the signal wiring and the power supply unit,
wherein
the filter circuit includes a plurality of filters having frequency characteristics different from each other, and
the 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 filter circuit based on the communication quality information.