CASPIAN JOURNAL
MANAGEMENT AND HIGH TECHNOLOGIES
Oversampling implementation in ПѓОґ-ADC based on continuous time integrators
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Read | Yurmanov Valeriy A., Piskaev Kirill Yu., Kuts Alexandr V. Oversampling implementation in ПѓОґ-ADC based on continuous time integrators // Caspian journal : management and high technologies. — 2014. — №1. — pp. 113-122. |
Yurmanov Valeriy A. - Ph.D. (Engineering),Associate Professor, Penza State Technological University, 1a/11 proezd Baydukova / ul. Gagarina, Penza, 440039, Russian Federation, YurmanovVA@gmail.com
Piskaev Kirill Yu. - Senior Lecturer, Penza State Technological University, 1a/11 proezd Baydukova / ul. Gagarina, Penza, 440039, Russian Federation, PiskaevK@gmail.com
Kuts Alexandr V. - Ph.D. (Engineering),Head of Department of System Design, “EnergoTrend” Ltd. Co., 1G Titov St., Penza, 440028, Russian Federation, kuts2006@mail.ru
Today ΣΔ-ADC actively used in many measurement systems. It is known that these ADCs have unique metrological and technical characteristics. They are essentially indispensable in the problems of transformation of signals with a dynamic range of 120 dB, and frequencies up to hundreds of kilohertz. It is known that "accuracy-performance" ratio ΣΔ-ADC is established by means of oversampling ratio. To achieve the maximum possible value of this coefficient developers use switched-capacitor integrators within manufacturing technology of digital integrated circuits. In the class of continuous integrators ΣΔ-ADCs have lower speed, at least ten times. The purpose of this paper is to develop an algorithm sigma-delta (ΣΔ) conversion, which allows to improve the performance of ΣΔ-ADC based on continuous integrators to the level of ΣΔ-ADC on switched-capacitor integrators. The authors proposed to use two frequency sampling: the first is determined by the speed of analog part of ΣΔ-ADCs, the second – the speed of the digital part. Mathematical simulation confirmed the efficiency of the proposed solutions.
Key words: analog-to-digital conversion, oversampling ratio, , increase of accuracy, increase of performance, , mathematical modeling, simulation , integration type measuring converters