Високопродуктивні АЦП із змінними тривалостями тактів порозрядного наближення з ваговою надлишковістю

Abstract

The dissertation is dedicated to the investigation of high-productive ADCs with changing tact durations of successive approximation with weight redundancy. The total science result – the science-technical task of productivity increasing of successive approximation ADC with weight redundancy has been solved, owing to conversion time decrease with resolution saving. It allows to increase the scope of using analog-to-digital converters. The method of productivity increase of successive approximation ADC with weight redundancy is proposed, owing to operations speed increase, which is reached due to conversion time decrease, thanks the usage of changing tact durations of successive approximation and automatic regulation of analog signals comparison operation sensitivity. Mathematical models of static and dynamic errors of fast successive approximation with weight redundancy, which takes into consideration regulation of analog signals comparison operation sensitivity are elaborated. It allows to define optimal distribution of weight redundancy for static and dynamic errors compensation. The proposed approach allowed to build structure schemes of high-productive successive approximation ADCs with weight redundancy with DAC with weight redundancy based on non-redundant binary DACs. It avoids the usage of special components for building ADCs with weight redundancy and allows using serial components in the form of binary DACs.