BAND-PASS TUNABLE SELF-CONSISTENT LC-FILTER Russian patent published in 2010 - IPC H03H7/12 

FIELD: electricity.

SUBSTANCE: filter includes the first inductance coil to the outputs of which there connected is the second and the third inductance coil, the second outputs of the second and third coils are connected to common bus, as well as two capacitors of variable capacity, the first outputs of capacitors are connected to common bus; besides filter includes the fourth inductance coil connected to input potential terminal of filter and to the second output of the first capacitor, fifth inductance coil connected to output terminal of filter and to the second output of the second capacitor, the sixth inductance coil connected to the second output of the first capacitor and to the first output of the second inductance coil, the seventh inductance coil connected to the second output of the second capacitor and to the first output of the third inductance coil.

EFFECT: improving amplitude-versus-frequency characteristics at large values of tuning range.

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