The aim of the course is to acquaint students with modern electrical circuit applications, the principles of circuit and system analysis, the simplest measurement methods, and the simplest implementation of circuits, based on the acquired physical knowledge. 1. Basic concepts of electricity. 2. DC networks. Circuit elements and Kirchhoff laws. The method of loop currents and node potentials. 3. Analysis of steady-state AC circuits, method of complex amplitudes, concept of impedance. 4. Methods of analysis of nonlinear circuits. Definition of small-scale models, the concept of bias. 5. Operation of diode, bipolar and field-effect transistors and analysis of their characteristics. Defining case-sensitive models. 6-7. Active analog circuits containing discrete circuit elements. Bipolar and FET transistor amplifiers, rectifiers. 8-9. The concept and application of feedback. The most important parameters of real operational amplifiers and their application. The Lock-in amplifier. 10. Electrical measurement of physical quantities, sampling, digitization of signals (A / D and D / A converters). 11. Special complex circuits and application examples (protection of power supplies, controllers, circuits). 12. Implement simple circuits