SELECTIVE AMPLIFIER Russian patent published in 2013 - IPC H03F3/42 H03H11/00 H03K5/00 

FIELD: radio engineering, communication.

SUBSTANCE: selective amplifier comprises a source of a signal, an input transistor, the emitter of which is connected with the first bus of the power supply source, and the collector is connected with the emitter of the first output transistor and via the second current-stabilising dipole is connected with the second bus of the power supply source, the second output transistor, the base of which is connected with the base and the collector of the first output transistor, and via the third current-stabilising dipole it is connected with the first bus of the power supply source, the fourth current-stabilising dipole connected between the emitter of the second output transistor and the second bus of the power supply source, the fifth current-stabilising dipole connected between the collector of the second output transistor, connected with the output of the device and the first bus of the power supply source, the first correcting capacitor, which shunts the device output. The signal source is connected with the emitter of the input transistor via an additional correcting capacitor, the base of the input transistor is connected with the device output, which is shunted with the first additional resistor.

EFFECT: higher quality of an AFC amplifier Q and amplification ratio by voltage K₀ at quasi-resonance frequency f₀, reduced total power consumption and implementation of a high-quality selective HF device.

2 cl, 6 dwg