Computer simulation of a push-pull power amplifier

The paper presents the results of computer simulation of power amplifiers based on bipolar and complementary Darlington transistors. It is shown that the constant voltage gain is ensured by changing the current gain in the range from 103 to 105

RESEARCH OF THE RANGE OF SUSTAINABLE WORK OF THE CASCADE INJECTION-VOLTAIC TRANSISTOR IN THE FIELD OF THE ORIGIN OF AN ELECTRIC AVALANCHE BREAKDOWN

In this work, the mechanisms of stabilization of the operating modes of cascode injection-voltaic transistors are identified. The results of a study of the current-voltage characteristics of a cascade injection-voltaic transistor are presented. It is shown that the proposed transistor works stably at collector-base reverse voltage values 2-3 times higher than individual transistors

ASSESSMENT OF STRESS-STRAIN STATE OF EARTH DAMS WITH ACCOUNT FOR GEOMETRICAL NONLINEARITY UNDER STATIC LOADS

Mathematical statement, methods and algorithms for assessing the stress-strain state (SSS) of earth structures are given in this paper taking into account geometric nonlinear soil strain under static influences. In the course of research, it was found that an account for geometrically nonlinear strain in soil leads to a noticeable change in the stress-strain state in high-rise structures and to an increase in all stress components. High concentration of stresses, which are the cause of strength damage in the zones of earth dams, is observed in the in the upper part of the coretransition zone contact point and in the upstream side