FIELD: radio electronics.
SUBSTANCE: invention relates to radio electronics and can be used for signal selection. Filter comprises an operational amplifier having two inputs and one output connected to an output potential terminal, first and second two-terminal devices connected by first leads to the corresponding input of the operational amplifier, and second to the input potential terminal of the filter, at that one bipolar includes parallel connected capacitor and four dipoles, the second one contains parallel connected capacitor and two bipolar ones, and parallel to filter input there is a bipolar connected parallel to inductance coil and capacitor.
EFFECT: technical result consists in expansion of range of means when creating active electric filter on two pass bands.
1 cl, 2 dwg
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