Статичні похибки генераторів компенсувального сигналу для АЦП слідкувального типу із ваговою надлишковістю

Abstract

The static error of the compensating signal generators for a multi-bit tracking ADC built on inaccurate DAC with weight redundancy is analyzed in this article. The mathematical model of the compensating signal generators static error before and after correction is proposed. It is proved that the use of the self-calibration procedures of a DAC with weight redundancy built on inaccurate elements and proposed methods of a compensating signal generating can significantly (by 2-3 orders) reduce the absolute error and thereby improve the accuracy of the ADC.