Methods of calculation of analog circuits and synthesis of discrete devices of combinational type and automata with memory are considered. Examples of calculation of analog circuits and implementation of digital devices for various purposes on integrated circuits. are given. The textbook complies with the Federal State Educational Standard of Direction 230100. 62 and 230100. 68 "Computer Science and Technology" . Contains material, necessary for the formation of students' knowledge of the basics of analog and digital circuitry and the principles of building digital nodes , instilling digital device design and development skills , as well as practical work and course project in the discipline "Electrical Engineering , electronics and circuitry" . The textbook can be useful for students of specialties "Design and technology of electronic computing tools", "Biotechnical and medical devices and systems" and "Integrated protection of objects of informatization" ..