Многоканальная аналого-цифровая система для регистрации импульсных низкочастотных сигналов на основе избыточного цифро-аналогового преобразователя

Abstract

The problems of construction o f the AD systems with high linearity forward and re­verse conversion of analog signals are considered. Such systems are widely exploited in various fields of science and technology. The article analyzes the main approaches to the construction of the AD systems and their advantages and drawbacks. There was offered a method of designing the forms of information converters, in which there are used as a part the DAC with weight redundancy that allows you to create the AD systems at low current element base and at the same time have high static and dynamic characteristics. There were offered the analytical ratios, confirming the prospects of the proposed approaches, carried out computer modeling of DAC with an active filter based on DCA, recommendations for the definition o f the optimal values o f the filter parameters.