| 摘要 |
PURPOSE:To reduce power consumption by switching the power supplies of a transmitter and a receiver during transmission and reception, and connecting a power source only when remote operation is performed. CONSTITUTION:When transmission buttons 1a-1d are pressed, a voltage output from a DC power source 11 appears at the output of a diode OR circuit 12 to turn on a switch element 3. Then, a transmitting means 2 is supplied with electric power and a self-holding means 14 holds the element 3 on at the same time. A transmission end detecting means 18 generates a signal at the end of the transmission. The means 14 is reset with its output the delay time of a delay means 19 later to cut off the electric power supply to the transmitting means 2. Then, the switch element 8 is turned on through an OR circuit 20 with the output signal of the means 18 at the end of the transmission and while a receiving means 7 is supplied with electric power, the self-holding means 21 holds itself to maintain the on state of the element 8. |
