PRF coherent, pulsed oscillator apparatus

Details PRF coherent, pulsed oscillator apparatus PRF coherent, pulsed oscillator apparatus

1985-06-12

1987-07-28

LaRoche, Eugene R.

Oscillators

Plural oscillators

Oscillator used to vary amplitude or frequency of another...

331 75, 331 77, 331173, 331117R, 332 9T, 342201, H03K 708

Patent

active

046834460

ABSTRACT:
Phase locked, pulsed oscillator apparatus, for example, for radar use, comprises a pulsed r.f. oscillator, a pulse repetition frequency (PRF) generator and a pulse shaping network. The PRF generator pulsed output signal of frequency, f.sub.1, is reshaped by the pulse shaping network to provide to the input gate of the r.f. oscillator a train of triggering pulses each having a very fast rise time, t.sub.r, which caues the triggering pulses to exhibit significant harmonic power near the r.f. oscillator's free running frequency, f.sub.FR. The reshaped pulses provided by the pulse shaping network gate the r.f. oscillator on and off and cause coherency of the pulsed oscillator output signal relative to the PRF generator output signal. The reshaped pulse rise time, t.sub.r, is preferably less than about 3-4, and more preferably is about two, times the oscillator output signal period, l/f.sub.FR. The peak turn on voltage, V.sub.p, of the reshaped pulses is preferably about twice the average voltage, V.sub.avg, of such pulses. PRF generator frequency, f.sub.1, may be modulated in a manner enabling the communication of information by the r.f. oscillator.

REFERENCES:
patent: 3270342 (1960-04-01), Stemmer

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