Frequency discriminating circuit

Details Frequency discriminating circuit Frequency discriminating circuit

H - Electricity

03

D

329/20, 350/72

H03D 3/26 (2006.01) H03D 3/08 (2006.01) H04N 5/44 (2006.01) H04N 11/18 (2006.01)

Patent

CA 1060552

ABSTRACT OF THE DISCLOSURE 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 ad- justing 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,

242758

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