Humeniuk R. Methods and instruments for operative estimation of weight deviations of the digits of successive approximation ADC with weight redundancy

The scientific problem on the development of methods and instruments of operative estimation of weight deviations of the ADC digits of consecutive approximation with weight redundancy is solved in the dissertation work. It is shown that all modern self-calibrated ADCs require the procedure of stopping the process of basic conversion for the calibration period. The method of operative fix of weight deviations of ADC digits of consecutive approximation with weight redundancy which allows formalizing the process of detection of weight deviations of digits on the analysis of characteristic of transformation is developed. Characteristic features having all unused combinations within a certain zone and subzone are revealed. The issues of overlapping and absorption by zones of higher levels and zones of lower levels are also considered. The research was made about the possibility of estimating the values of weight deviations of the discharges by the number of unused combinations in certain areas. It is proved that the error of estimating the weight value of a single category does not exceed 0.5 units of the lower category. A sequential algorithm for determination of the deviations of bit weights by analyzing the transformation characteristics is proposed. The algorithm was tested on a separate example, which confirmed the accuracy of the proposed method. A number of structural implementations of methods to fix and estimate the ADC bits deviation of sequential approximation with weight redundancy are proposed. Specialized software was developed for modeling the developed methods.