| 摘要 |
PURPOSE:To repeat a retrigger in a short time by inserting a monostable multivibrator into the input of a trigger frequency dividing circuit, and correcting an input pulse width to a prescribed value or above. CONSTITUTION:The output TRG of a trigger timming generating circuit is brought to AND with the Q side output of an FF circuit 13 by an AND gate 14, provided to a driving amplifier 17 and becomes an output A. In the same way, said output is brought to AND with a Q' side output of the circuit 13 by an AND gate 15, provided to a driving amplifier 18 and becomes an output B. Also, outputs of the gates 14, 15 are provided to an OR gate 16, and its output is provided to a monostable multivibrator 21. The monostable multivibrator 21 is adjusted to the time which is longer than the signal TRG, and also the time which is shorter than a reignition period, and an output having its width is applied to an input terminal of the circuit 13. Accordingly, the input signal T of the circuit 13 becomes one pulse of a prescribed pulse width even if the signal TRG is aplit by a noise, etc., the circuit 13 is inverted with respect to one each of the signal TRG, the signal A and B are outputted alternately, and the retrigger of a discharge tube can be repeated in a short time. |
