The book is a fundamental work combining the principles of semiconductor elements (diodes, bipolar and field-effect transistors, integrated circuits) and the basics of creating from these elements various functional units of analog technology (amplifiers, modulators, filters, radio receivers) and digital (triggers, counters, registers, encoders and decoders, memory devices, etc.). The book is divided into two volumes: the first is devoted to the basics of circuitry, the second - to the use of functional units in the creation of more complex devices.