Compensation of nonlinear distortions in multistage amplifiers

The paper deals with the methods of nonlinear distortion compensation for even and odd orders in the output of multistage amplifiers for radio receivers. The essence of the method is using the additional re-interactions of the base frequencies with the second harmonics and combinations to neutralize the unwanted spectral components. The optimal configuration of the dual-channel amplifier circuits FET is suggested for the simultaneous suppression of the second and third order intermodulation distortion. The advantages are shown to compensate the third order intermodulation products in the final summator relative to their minimization in separate channels.