Selectively tunable heterodyne receiver

Details Selectively tunable heterodyne receiver Selectively tunable heterodyne receiver

1978-05-05

1979-11-20

Bookbinder, Marc E.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 78D, 324 79D, 325455, 331 64, H04B 126

Patent

active

041752546

ABSTRACT:
A selectively tunable heterodyne receiver including a plurality of frequency conversion stages which can be tuned to a desired receiving frequency by the use of two voltages which control the coarse and fine tuning adjustments and wherein the first voltage is supplied to a first injection oscillator to control the harmonic output of a crystal controlled harmonic generator and wherein the second voltage is supplied to a second injection oscillator which is continuously variable within a frequency range corresponding to the frequency spacing between the adjacent harmonics of the harmonic generator and wherein the second oscillator is stabilized to the desired adjusted frequency.

REFERENCES:
patent: 2654832 (1953-10-01), Robinson
patent: 3569838 (1971-03-01), Blair et al.
patent: 3569865 (1971-03-01), Healey
patent: 3938048 (1976-02-01), Elliott
patent: 4061980 (1977-12-01), Sato
patent: 4114101 (1978-09-01), Sekiguchi

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