Communication device, communication system, and vehicle

摘要

A communication device includes: an oscillating circuit for generating a single including a signal potential that is based on a reference potential; a first terminal for communicating with a vehicle; and a first resistance circuit connected between an output of the oscillating circuit and the first terminal and having a resistance value variable according to a first input signal. Preferably, the vehicle includes: a second terminal connected to the first terminal; and a second resistance circuit connected between a ground node fed with the reference potential and the second terminal. The vehicle is provided with a first signal extraction node on a path connecting the second terminal and the second resistance circuit to each other.

主权项

1. A communication device communicating with a vehicle, comprising:
a signal generating unit for generating a signal including a signal potential that is based on a reference potential; a first terminal for performing two-way communication with said vehicle; a first resistance circuit connected between an output of said signal generating unit and said first terminal and having a resistance value varying according to a first input signal; and a detecting unit detecting a signal at a signal extraction node on a path connecting said first terminal and said first resistance circuit to each other.