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

FIELD: radio engineering, communications.

SUBSTANCE: selective amplifier comprises a source of a signal (1), connected to the base of the first (2) input transistor, emitter of which is connected to the emitter of the second (3) of the input transistor and via the first (4) current-stabilising dipole is connected to the first (5) bus of the signal source, an output transistor (6), the base of which is connected with a source of auxiliary voltage (7), and a collector is connected to a collector of the first (2) input transistor, the second (8) current-stabilising dipole connected between the emitter of the output transistor (6) and the first (5) bus of the supply source, the first (9) and second (10) frequency-setting resistors, the first (11) correcting capacitor, the second (12) bus of the supply source, connected with the collector of the second (3) input transistor. The collector of the output transistor (6) is connected with the second (12) bus of the supply source via the first (9) frequency-setting resistor and is connected by AC with the common bus of supply sources (13) via serially connected the first (11) correcting capacitor and the second (14) correcting capacitor, the common unit of which is connected to the base of the second (3) input transistor and via the second (10) frequency-setting resistor is connected to the emitter of the output transistor (6) and the output of the device (15).

EFFECT: reduced total power consumption.

4 cl, 11 dwg