How can i use a crystal oscillator to gen a high freq. 12-18Vdc pulse?

Question

How can i use a crystal oscillator to gen a high freq. 12-18Vdc pulse?

Answer 1

It is not clear to me what you mean by 12 to 18 volt dc pulse.

If you mean that you want to generate a high-frequency signal output that is pulsed (turned on and off) at some given rate, then use the crystal oscillator to generate the sine wave signal at the desired frequency, feed that sine wave signal into some kind of gated linear amplifier.  Perhaps the gated amplifier could be normally held off (cutoff) until a pulse rate circuit pulses the gate on (maybe some kind of AND gate configuration); thus, turning the gated linear amplifier on for the period of the pulse from the pulse rate circuit.  Do you kind of see what I'm attempting to get at here.  The resulting output would be the crystal oscillator frequency pulses, at the rate of the pulse rate circuit.

Answer 2

If you use a c.m.o.s. chip as the active oscillator it will produce rectangular output pulses at the crystal's frequency.

You would be advised to use a buffer between the oscillator's output and whatever you want to drive.  

The amplitude of the output pulses will be a little less than the value of the i.c's supply voltage.