HIGHLY SELECTIVE BAND-PASS TUNEABLE LC FILTER Russian patent published in 2012 - IPC H03H9/00 

FIELD: information technology.

SUBSTANCE: invention relates to radio electronics. The highly selective band-pass tuneable LC filter has: two structurally identical band-pass circuits, each having a first, second, third, fourth, fifth, sixth, seventh and eighth inductance coil, a first, second and third capacitor, a common bus, an amplifier, an input potential terminal for the device, an output potential terminal for the device, four signal buses, the filter also has N structurally identical sections of a first group, each having a first electronic switch, M structurally identical sections of a second group, each having a third electronic switch.

EFFECT: high bandwidth ratio of the filter attenuation characteristic, higher level of attenuation in the attenuation band while maintaining low variation in frequency response in the pass band, high transfer constant and manufacturability of the device.

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