Hard Tube Automatic Pulse Repetition Frequency Doubler

ABSTRACT

The manual adjustment required for allowing for variations of PRF in the hard tube PRF multiplier previously reported has been made automatic by using a frequency sensing system. This consists of a suitable combination of an a.c. coupled gate, a diode clamp and a Miller integrator using a cathode follower which feeds to a rectifier. Although the circuit described is for the PRF doubler only, an indication is given of how the principles emerging out from this could be utilized for obtaining an n th order multiplication of the PRF. Also, a use of the circuit is described whereby it acts with minor adjustments as a generator of simulated input pulse with a delay (with reference to the input) which is any desired fraction of the varying pulse recurrence time of the regularly recurrent input.