SELECTIVE AMPLIFIER Russian patent published in 2013 - IPC H03F3/45 

FIELD: radio engineering, communications.

SUBSTANCE: in the amplifier a collector of the first (1) input transistor is connected to an emitter of the output (5) via serially connected the first (9) correcting capacitor and the second (10) frequency-setting resistor, is connected to the second (7) bus of the supply source via the third (11) frequency-setting resistor, besides, the collector of the output transistor (5) is connected with the common unit of the first (2) frequency-setting resistor and the first (3) current-stabilising dipole via an additional current mirror (12), and its common emitter output (13) is connected with the common unit of the first (2) frequency-setting resistor and the first current-stabilising dipole (3), the base of the first (1) input transistor is connected with the second (12) auxiliary source of supply, the source of input voltage of the device is connected via the second (14) correcting capacitor with the common emitter output (13) of the additional current mirror (12), and the potential output of the device (15) is connected with the collector of the first (1) input transistor.

EFFECT: reduced total power consumption of a selective amplifier.

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