Model of Sigma-delta A/D Converters and Properties of Real Instruments
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Vysoká škola báňská – Technická univerzita Ostrava
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Abstract
The Sigma-Delta analog to digital converter is an over-sampled converter that provides high resolution and flexibility in converting low bandwidth signals. The internal process of conversion of the converter is processed to understand the conversion of a constant voltage to a digital signal. By using the method of Allan deviation, the frequency stability of the converter is determined. The frequency response of the anti-aliasing filter is measured and processed to determine the efficiency of the converter.
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Sigma delta A/D converters, Internal process, Frequency response, Anti-aliasing filter, Allan deviation, Decimation filter, Allan variance of USB-4432.