| 摘要 |
PURPOSE:To elevate the reliability with the protection of a transmitter by removing a part of concentrated pulse output with the addition of number of pulse controlling circuit to equalize the duty of a transmission pulse. CONSTITUTION:Outputs (f) and (g) of a counting circuit 13 in a number of pulse controlling circuit 11 move to L when outputs (c) and (d) of an oscillator 12 are L while an output (b) of a monostable multivibrator 15 exceeds 4 pulses (set value) and operates to act as a prohibition gate with respect to a gate circuit 14. In the normal operation, the output (h) of the number of pulse controlling circuit 11 is the same as the input (a) and when pulses are concentrated, the input (a) following 5 pulses and thereafter is prohibited to achieve the equalization of the duty. |
