| 摘要 |
PURPOSE:To ensure an automatic make of power source of a transmitter and subsequent working and cut-off of the power supply, by carrying the information with the pulse train signal to transmit the information with the higher harmonic signal and thus giving an instantaneous operation of an operation switch. CONSTITUTION:The power source part 1 consisting of the battery incorporated into a transmitter is connected to the pulse designating part 3 of the next stage and the timer circuit 35 by closing the operation switch 2. The working state of the part 3 is kept although the operation of the switch 2 is instantaneous. At the same time, the supply of voltage is held for a certain time to both the pulse train signal generating part 4 and the high frequency wave generating part 5 by the timer circuit 35. The part 4 performs a pulse modulation according to the designation signal supplied from the part 3 to generate a modulated pulse train signal. This signal is radiated to outside with the high frequency signal generated at the part 5 used as a carrier wave. |
