SELECTIVE AMPLIFIER Russian patent published in 2012 - IPC H03F3/45 

FIELD: radio engineering.

SUBSTANCE: selective amplifier is proposed, comprising the first input transistor, the base of which is connected with the device input, an emitter via the first current-stabilising dipole is connected with the first bus of the supply source, and a header via the second current-stabilising dipole is connected by the second bus of the supply source, the second input transistor, the header of which is connected with the second bus of the supply source, and the emitter via the third current-stabilising dipole is connected with the first bus of the supply source, the first correcting condenser, switched between emitters of the first and second input transistors, at the same time the collector of the first input transistor is connected with the input of the additional current mirror, the common emitter output of which is connected with the device output, the base of the second input transistor, and via the fourth current-stabilising dipole it is connected with the first bus of the supply source, besides, between the device output and the common bus of supply sources there is the second correcting condenser is switched by AC, and the first additional resistor is switched in series with the first correcting condenser.

EFFECT: higher quality of amplifier amplitude-frequency characteristic and its amplification ratio by voltage at quasiresonance frequency.

2 cl, 6 dwg