FEATURES OF ANALOG-TO-DIGITAL CONVERSION IN MULTIPLE ELECTROCARDIOSIGNAL RECORDING SYSTEM

Background. Digitalization of medical information is the main physical process that determines the characteristics of medical information systems. Digital tools of modern medicine allow for breakthroughs in the very approach to treatment and prevention of diseases. In this regard, improving analog-to-digital conversion opens up new opportunities for the modern healthcare system. The purpose of the article is to develop a structure for analog-to-digital conversion of multiple-lead ECS. Materials and methods. The functional diagram of a specialized analog-to-digital converter (ADC) is considered, taking into account the multiplexing of analog channels, the sensitivity and required speed of the communication channel are calculated. The volume of digital data generated at the output of the analog-to-digital converter is calculated. The effect of the number of ADCs on the multiplexing coefficient is determined. Results. The paper presents a layout of the ECS multiple-lead registration unit, simulates the operation of the analog-to-digital converter, and obtains timing diagrams of the registration processes of a group of leads. Conclusions. The operation of the screening system of non-invasive electrocardiological diagnostics (SNEDS) with multiple registration of electrocardiographic signals corresponds to the paradigm of modern healthcare on the orientation of early diagnosis and prevention of diseases. Based on the analysis, prototyping and modeling, the choice of the multiplexing coefficient for the system of multiple registration of electrocardiographic signals (ECS) is substantiated.