SELECTIVE AMPLIFIER Russian patent published in 2014 - IPC H03F3/45 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio engineering and communication and can be used in filtering radio signals, television and radar. The selective amplifier comprises an input voltage source (1), a voltage-to-current converter (2), an output transistor (3), a first power supply bus (4), a first frequency-setting resistor (5), a first (6) and a second (7) balancing capacitor, a second (8) and a third (9) frequency-setting resistor, an auxiliary voltage source (10), a negative power supply bus (11), a common power supply bus (12), an output of the device (13), a first additional current-stabilising two-terminal element (14), an additional transistor (15) an additional capacitor (16).

EFFECT: high Q-factor of the amplitude-frequency curve of the selective amplifier and voltage gain (K₀) at quasi-resonance frequency f₀, which enables to reduce overall power consumption in many cases.

2 cl, 5 dwg