| 摘要 |
<p>PURPOSE: To prevent the operation of the reception side even when a switch gets trouble under an on state by detecting the off of a switch means and starting transmission. CONSTITUTION: The input terminal of a transmission-start control circuit 11 is connected to a switch 1, a change into an off state from an on state of the switch 1 is detected by the transmission-start control circuit 11, and a signal permitting the output to a transmission circuit 4 is transmitted to a control circuit 2. Accordingly, an ID code is output after the switch 1 is turned off from the transmission circuit 4. Since the signal is transmitted after the switch is turned off, the switch does not fail in the on state, and a reception unit is not operated even when the switch is maintained for a long term in the on state, thus improving the reliability of a device.</p> |
