Frequency discriminating circuit

Details Frequency discriminating circuit Frequency discriminating circuit

1975-12-31

1976-12-14

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

329140, H03D 326

Patent

active

039977978

ABSTRACT:
A frequency discriminating circuit having a double tuned circuit with a transformer, which has a first and second resonant circuits. The first resonant circuit is composed of a capacitor, a primary winding of the transformer and a first variable inductance element and the second resonant circuit is composed of a capacitor, a secondary winding of the transformer and second and third variable inductance elements, wherein the quality factor Q of the second resonant circuit is much larger than that Q of the first resonant circuit. The center frequency of the frequency-response characteristic (so-called S characteristic) of the discriminating circuit can be adjusted by adjusting the second and third variable inductance elements and the linearity of the frequency response characteristic of the discriminating circuit can be adjusted by adjusting the first variable inductance element.

REFERENCES:
patent: 2773181 (1956-12-01), Singel
patent: 3183449 (1965-05-01), Bray
patent: 3434075 (1969-03-01), Hawkins
patent: 3569846 (1971-03-01), Matsuura
patent: 3621409 (1971-11-01), Segawa

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