FIELD: radio engineering, communication.
SUBSTANCE: multiband tunable LC bandpass filter has two structure-identical bandpass circuits, each consisting of two inductance coils and three capacitors; the input and output of each of the circuits are connected through electronic switches on both inductance coils to an amplifier, eight signal lines, between which, through corresponding electronic switches, are connected corresponding multiple sections of three inductance coils or three capacitors.
EFFECT: high squareness ratio of the amplitude-frequency curve, high level of attenuation in the stop band, broader functional capabilities.
1 dwg
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