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

FIELD: radio engineering.

SUBSTANCE: selective amplifier includes the first (1) input transistor, input signal source (2), the first (3) current-stabilising bipole, the first (4) power supply bus, the second (5) input transistor, the first current mirror (6), the second (7) power supply bus, the second (8) current mirror, the third (9) current mirror, output of device (10), the second (11) current-stabilising bipole, the first frequency-setting resistor (12) and the first balancing capacitor (13), the second (14) frequency-setting resistor and the second (15) balancing capacitor.

EFFECT: improving Q factor of amplitude-frequency response of the amplifier and its voltage amplification factor at quasi-resonance frequency f₀.

2 cl, 6 dwg