Communication apparatus

A communication apparatus comprising:

• a first conductor and a second conductor;
• an analog circuit which executes an analog process to a differential signal in a condition that a potential of the first conductor is a reference;
• a connection circuit which includes a circuit element other than a capacitor and is connected to the analog circuit;
• a communication circuit which receives, via the connection circuit, a differential signal obtained by the execution of the analog process of the analog circuit and generates, based on the received differential signal, a signal with a reference corresponding to a potential of the second conductor;
• and
• a connection element which is a circuit element different from a capacitor and is connected between the first conductor and the second conductor.