SIGNAL TRANSMISSION DEVICE

摘要

Provided is a signal transmission device including: a transmission circuit (11) and a reception circuit (12) each equipped with a shunt regulator power source (110, 120) for supplying a constant current; and a signal transmission path (13) having a function to inhibit an AC component which makes a connection between the transmission circuit (11) and the reception circuit (12).  The ground GNDA of the transmission circuit (11) and the ground GNDB of the reception circuit (12) are independent from each other and connected at a single point to the ground GNDC of the shunt regulator power source (110, 120).