N Cycle Gated Periodic Waveform Generator.
DEPARTMENT OF THE NAVY WASHINGTON D C
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This patent describes a gated waveform generator programmable to produce an output having a predetermined number of cycles. A triggering pulse and the output from a zero-crossing detector are connected to different inputs of a bistable multivibrator. The triggering pulse causes the cyclic input signal to be applied to the zero-crossing detector so that the output of the bistable multivibrator is pulse coincident with a mode of the input signal. The outputs of the zero-crossing detector and the bistable multivibrator are connected to a monostable multivibrator having a period controlled by a timing network which determines the number of cycles in the output of the signal sources. Upon the occurrence of its first mode after the triggering pulse, the input signal is coupled for the determined time to an operational amplifier from which the output of the signal source is taken. Author
- Electrical and Electronic Equipment