"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 6, 2018

contents of issue      DOI  10.30898/1684-1719.2018.6.9     full text in Russian (pdf)  

analysis of processes in time varying circuit of general aspect

N. D. Birjuk, A. Yu. Krivtsov

Voronezh State University, Universitetskaya sq. 1, Voronezh 394018, Russia


The paper is received on May 28, 2018


Abstract. In many publications, it is maintained importance of analysis of nonlinear radio circuits. In spite of all this it does not make the principle of linear introduction [1], maintaining that solution of every nonlinear equation may be exactly achieved in specially sorting out linear equation. This principle, formulating for abstract mathematical equations, may be transfer to theory of radio circuits. In this case determination is following: arbitrary process in every nonlinear radio circuit may be exactly achieved in specially sorting out linear radio circuit. The principle of linear introduction raises importance of analysis of linear radio circuits of general aspect for theory of nonlinear circuits. For radio electronics it are interesting linear circuits with periodical varying parameters (capacitances, inductances, resistances). This is complicated problem in general case. In this publication it has been proposed the birst step in this direction exactly it is worked out analysis of time varying circuit. It is supposed that all elements of circuit are positive and change in time according arbitrary continuous periodical functions of time with the same periods. For this purpose it is adapted well-known in theory of circuits with constant parameter method of complex amplitudes. This mathematical method has been worked out inside electrotechics, it does not inscribe in classical mathematics. It is given particular attention to problem of stability of time varying circuit. In the time of solution this problem it is found that it is not given due attention Lyapunov’s theory of stability in radio electronics. This it is worked out an application Lyapunov’s theory of stability for problem of stability of time varying circuit, just that vary case of use of the first and the second Lyapunov’s methods. Besides that it is considered unlyapunov’s method of analysis of stability, working out on the basis of method of complex amplitude. Although proposing this analysis is limited with linear object (time varying circuit), it bears a relation to nonlinear circuit through principle of linear introduction.

Key words: the principle of linear introduction, time varying circuit, forcing oscillations, free process, theory of stability, analogy with time varying and usual circuit.

For citation:

N. D. Birjuk, A. Yu. Krivtsov. Analysis of processes in time varying circuit of general aspect. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 6. Available at http://jre.cplire.ru/jre/jun18/9/text.pdf

DOI  10.30898/1684-1719.2018.6.9