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Synthesis of a pre-amplification path with a series of cascades in order to reduce the nonlinear distortion


A.M. Bobreshov – Dr. Sc. (Phys.-Math.), Professor, Head of Department of Electronics, Dean of Faculty of Physics, Voronezh State University
N.N. Mymrikova – Dr. Sc. (Phys.-Math.), Professor, Department of Electronics, Voronezh State University
A.A. Yablonskikh – Post-graduate Student, Department of Electronics, Voronezh State University

In paper the section of a preamplification of the receiver with a series connection of stages is observed. The circuit design of turning on of the amplifiers collected under the circuit design a blanket source, for minimization of third-order intermodulation distortions is presented. Performances «intercept point» (IP3), as separate stages are observed, and at their multistage turning on.
Effects of modeling and experiment of a section of a preamplification are resulted and optimum behaviours of operation of transistors at which the underload value of level of intermodulation components of the third order is attained at the plus transfer ratio are chosen.

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