Analysis of three-phase circuitry. Transient analysis - 1.order and 2. order circuits. Two-port networks, their classification and transmission parameters. Variable parameter circuitry, phasor line, amplitude and phase characteristics, Bode´s method. Quiescent point of nonlinear element. Feedback .Transient effects in pulse generators. Classification of linear circuitry with distributed parameters, parameters of one-way transmission line, telegraph equations, homogneous line and its transport parameters. Lossless line, space analysis of voltage, current, power and energy for time-varying quantity, reflection coefficient.