Power-Over Data Line Communication Device and Power-Over Data Line Communication System

A power-over data line communication device with power overlaid on a differential signal wiring, the power-over data line communication device comprising:

• a first differential wiring having a first signal wiring and a second signal wiring connected to the differential signal wiring;
• a first power supply element configured to supply a first applied voltage and a second applied voltage to the first signal wiring and the second signal wiring, respectively;
• a first high-frequency cut filter connected to the first signal wiring on one end side thereof;
• a second high-frequency cut filter connected to the second signal wiring on one end side thereof;
• and
• a first inductor including a first coil and a second coil, with one end of the first coil being connected to the other end side of the first high-frequency cut filter, one end of the second coil being connected to the other end side of the second high-frequency cut filter, and the first coil and the second coil being magnetically coupled to each other by being reversely wound,
• wherein an inductance value L1 of the first high-frequency cut filter and an inductance value L3 of the first coil of the first inductor have a relationship of L1<1.5×L3, and
• an inductance value L2 of the second high-frequency cut filter and an inductance value L4 of the second coil of the first inductor have a relationship of L2<1.5×L4.