| 摘要 |
PURPOSE:To obtain a transmitter for an electric wave remote survey capable of controlling the transmitting interval and the transmitting time optionally by providing a digital circuit to the control circuit to the transmitting interval and the transmitting time. CONSTITUTION:As an oscillation circuit 9, the circuit to use an as table oscillation circuit, the circuit to use two mono-stable transmitting circuits, set the transmitting time on one hand, the transmitting interval on the other hand and output a trigger mutually, the circuit to the use the circuit wired to the self-trigger type by a mono-stable oscillation circuit, the circuit to use a voltage comparing circuit and the circuit to use a pulse oscillation circuit to use the hysteresis of a Schmitt trigger circuit are provided, and for setting the transmitting interval and the transmitting time, a digital circuit 8 is used. Because of the digital circuit, the transmitting interval and the transmitting time are hard to receive the change of the voltage and the setting comes to be easy.
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