Fundamental conceptions, electric circuit law and solving methods. passive element characteristics and utilization, passive RC, RL and RLC circuits solving. signal characteristics and description. semiconductor component characteristics and characterization, diodes, transistors, thyristors, operational amplifiers, optoelectronic elements. amplifier parameters and design, switches, flip-flop circuits with transistors, Integrated Circuits and operational amplifier. voltage and current supply characteristics, rectifiers with collective capacitor, linear and impulse voltage rectifiers D/A and A/D converter principles. optoelectronic element application.