Patent ID: 11916547
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor relay device comprising:
a transmission circuit that outputs a first signal;
a conversion circuit configured to output a second signal that is based on the first signal over a period of receiving the first signal;
an overheat protection circuit that keeps outputting a control signal having a first magnitude using the second signal over a period of receiving the second signal and having a temperature lower than a first temperature, transitions to a state in which the overheat protection circuit outputs the control signal having a second magnitude using the second signal when the overheat protection circuit has a temperature higher than or equal to the first temperature during a period of receiving the second signal, and keeps outputting the control signal having the second magnitude once the overheat protection circuit has a temperature higher than or equal to the first temperature; and
a switch circuit that electrically connects a first terminal and a second terminal over a period of receiving the control signal having the first magnitude, and electrically disconnects the first terminal and the second terminal over a period of receiving the control signal having the second magnitude.