NOISE SHAPING STRUCTURES OF BAND PASS ΣΔ ADC AND THEIR IMPACT ON METROLOGICAL PARAMETERS

Marián Chovanec, Linus Michaeli, Ján Šaliga

Abstract

The bandpass sigma delta analog-digital converters (BP ΣΔ ADC) represent the unconventional ADCs, which are mostly embedded into digital communication systems or direct conversion of the voltage vector into the digital complex number. The structure of the noise shaping feedback impacts dominantly S/N ratio. The various feedback structures of the BP ΣΔ ADC designed from their low-pass prototype will be presented in the paper. The impact of the proposed structures on the basic metrological parameters of the BPΣΔ ADC will be analyzed here.

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IMEKO-IWADC-2008-079.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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