The textbook outlines the basics of logic algebra, the electronic component base of information processing systems, and special issues in the circuitry of measuring instruments using the example of photoelectric readout and measuring devices. The issues of correction of the system of measuring signals and their hardware implementation are considered, an analysis of methods and means of structural compensation of measurement errors is carried out, and the theory of electronic phase interpolators is presented. The relationship between mechanical, optical and electrical parameters in the processing of measurement information is shown. The book is intended for university students undergoing training in the direction of "Instrumentation" who do not have extensive training in electronics, optics and applied mathematics. Certain sections of the book will be useful to specialists in the field of circuit design, optoelectronics and measurement technology.