COMPARATIVE ANALYSIS OF THE OPERATION OF THE MODERNIZED SAMPLING AND STORAGE DEVICE WITH ITS PROTOTYPE

Abstract

Analogue-to-digital converters (ADCs) and digital-to-analog converters (DACs) are an integral part of information and measurement systems, and therefore largely determine the efficiency of their operation. The use of ADCs and DACs in measuring systems requires the modernization of their analog and digital devices: amplifiers, switches, filters, control devices, sampling and storage devices, etc. Therefore, modernization and improvement of the element base of ADC and DAC will make it possible to exclude static and dynamic components of the total error, optimizing the entire path of the measurement signal. The very issue of improving the operation of the ADC, or rather, its structural element – the sampling and storage device, is the key in this work. The article compares the operation of the modernized device patented by the group of authors of this article [6, с. 4.22] with its prototype, the sampling and storage device (SSD), which is widely used in automation, electronics and radio engineering [9, с. 981]. A detailed description of the basic scheme of the modernized PVZ and its prototype is given, the shortcomings in the operation of the already known device are indicated, the cause of these shortcomings is detailed, and it is shown how these shortcomings are eliminated in the newly created device, namely the principle of operation of its electrical circuit: the modernized device is additionally equipped with a signal level amplifier and an additional feedback resistor. The data of the modeling process of the already known and newly created PVZ in the EveryCircuit program are also given, the graphs of which clearly show the quality of the processed signal: it can be seen that the modernized device works better, that is, the processing of the analog signal is more qualitative and dynamic, which is extremely important for obtaining accurate data and excluding measurement errors at a rapidly changing signal in an analog-to-digital converter.