Semenov A. Methods and devices for generating and forming signals with regular and chaotic dynamics for infocommunication systems.

The thesis is dedicated to solving the scientific and practical problem, that is creating new and improving well-known methods and devices of generating and forming signals, that provide regular and chaotic signal dynamics control at electric retuning self-oscillatory system parameters of such devices in a wide range, preserving stability of their operating modes, optimized by the maximum of informational properties, particu-larly entropy and fractal dimension. The Van der Pol method for constructing oscillators of signals with regular dynamics and the Chua, Kiyashko-Pikovsky-Rabinovich, and Anishchenko-Astakhov methods for constructing oscillators of signals with chaotic dynamics have got a further development. They differ from well-known ones by applying non-linear and reactive properties of the transistor structures with negative differential resistance. Mathematic models of the Van der Pol oscillators of periodic and quasiperiodic electric oscillations based on transistor structures with negative differential resistance have been improved. Mathematic models of the Kiyashko-Pikovsky-Rabinovich and Anishchenko-Astakhov oscillators of chaotic electric oscillations based on transistor structures with negative differential resistance have been improved. For oscillators with electric control of periodic and chaotic signal dynamics new circuits have been developed and well-known ones have been improved. Dynamic processes in the self-oscillatory systems of these oscillators have been examined at electric retuning their parameters in a wide range. Non-linear and chaotic operating modes in the developed oscillator circuits with electric control of periodic and chaotic signal dynamics have been examined. Parameters of self-oscillatory systems of these oscillators have been optimized by the maximum of the Kolmogorov-Sinai entropy. Dynamic processes in the Colpitts oscillators with one-transistor and two-transistor active element using voltage-controlled transistor capacitance equivalents have been examined. Parameters of self-oscillatory systems of these oscillators have been optimized by the maximum of the Kolmogorov-Sinai entropy. A new method for forming periodic signals in non-autonomous devices based on the transistor structures with negative differential resistance and a Λ-type static I-V curve has been proposed. A new mathematical model of devices for forming periodic signals has been developed, dynamic processes in them have been examined in modes of input signal amplification, frequency division, and amplitude modulation. There have been developed new and improved well-known circuits of electrically-controlled frequency multipliers, electric filters, and phase shifters with regular dynamics, which operate using non-linear and reactive properties of the transistor structures with negative resistance.