Signal transmission device, electronic device incorporating the signal transmission device, and vehicle incorporating the electronic device

Abstract

A signal transmission device includes a transmission circuit, a reception circuit, and an isolation circuit. The transmission circuit is configured to drive at least one of a first internal signal and a second internal signal at a specific period according to an external signal. The reception circuit includes: a detection circuit configured to be able to detect that the period of at least one of the first internal signal and the second internal signal is the specific period; a first driving circuit configured to set the gate of a switching device to high impedance state according to the detection result of the detection circuit; and a second driving circuit configured to turn ON the switching device by inputting a specific voltage to the gate according to the detection result. The specific voltage has a voltage value higher than or equal to the ON threshold voltage of the switching device.