FIELD: electricity.
SUBSTANCE: four variants of electric signal amplifiers and a method of electric signal amplification are proposed. The proposed electric signal amplifiers contain two groups of inductance coils installed pairwise with a gap in parallel planes coaxially opposite each other, series-connected to the capacitance and forming a resonant circuit, and a device for periodical changing the parameters of the resonant circuit that includes light sources which can be made and installed in various ways.
EFFECT: increased electric signal amplifier gain and increased stability of the amplifier gain when the load changes.
27 cl
