Radio circuit tuned by adjustably deforming an inductance coil

Details Radio circuit tuned by adjustably deforming an inductance coil Radio circuit tuned by adjustably deforming an inductance coil

1983-02-15

1985-04-16

Laroche, Eugene R.

Tuners

Tuner unit with electromagnetic operator

Band scanning or selector circuit

334 46, 334 71, 336 20, H03J 730

Patent

active

045118698

ABSTRACT:
A system and method for adjusting the frequency of operation of a radio frequency circuit including an inductive loop having an adjustable exposed inductor portion is provided. The frequency of operation of the circuit is first detected with means for detecting a parameter relating to and representing the frequency of operation. The adjustable inductor portion is associated with a selectively movable actuator device coupled to the frequency detecting means and a source of signals representing a predetermined frequency of operation for the circuit. A control circuit means, preferably a computer, is coupled to the detecting means and to the source of signals to provide an output control signal when the detected frequency of operation bears a predetermined relationship to the predetermined frequency of operation. The control signal operates the actuator device to adjust the configuration of the exposed inductor portion by moving the actuator device whereby the inductance of the inductive loop and the frequency of operation are associatively varied. The configuration of the inductor portion is fixed at a position of adjustment determining the frequency of operation to be at the predetermined frequency.

REFERENCES:
patent: 2410222 (1946-10-01), Lawrence, Jr.
patent: 2511580 (1950-06-01), Goodrich
patent: 2624042 (1952-12-01), Loe
patent: 2857519 (1958-10-01), Gaskill et al.
patent: 2877351 (1959-03-01), Sacre
patent: 3590385 (1971-06-01), Sabo et al.
patent: 4234960 (1980-11-01), Spilsbury et al.
patent: 4272743 (1981-06-01), Evans

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