Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Patent
1978-01-03
1979-07-10
Kominski, John
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
343 65R, H03B 530
Patent
active
041609573
ABSTRACT:
Jamming arrangements comprising an oscillator including a number of circuits each comprising a surface acoustic wave filter feeding an amplifier responsive only to signals above a predetermined threshold level, the filter characteristics being chosen so that each circuit is responsive to a different range of frequencies, the circuits being connected mutually in parallel and a switch being provided via which the output circuits of the terminals are coupled to the input terminals to define a feedback loop when the switch is closed, the arrangement being such that when the switch is closed and a signal to be jammed is injected into the loop at a frequency within the pass band of at least one of the filters so as to produce a signal which is fed to its associated amplifier above the threshold, oscillation is maintained around the loop at the frequency of the signal to be jammed.
REFERENCES:
patent: 3225300 (1965-12-01), Barney et al.
patent: 3921093 (1975-11-01), Lewis
patent: 3950713 (1976-04-01), Lewis
Electronic Letters, vol. 11, No. 5, pp. 119-120, Mar. 6, 1975, Harteman.
Electronic Letters, vol. 12, No. 2, pp. 39-41, Jan. 22, 1976, Manes.
Kominski John
Plessey Handel und Investments AG
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