Original scientific paper

https://doi.org/10.17559/TV-20151124100705

Stochastic measurement of noise true RMS using two-bit flash A/D converters

Platon Sovilj orcid.org/0000-0002-3274-9337 ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositejа Obradovicа 6, 21000 Novi Sad, Serbia
Bojan Vujičić orcid.org/0000-0002-3640-685X ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositejа Obradovicа 6, 21000 Novi Sad, Serbia
Matija Sokola ; School of Professional Higher Education, Školska 1, 21101 Novi Sad, Serbia
Dragan Pejić ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositejа Obradovicа 6, 21000 Novi Sad, Serbia
Željko Beljić ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositejа Obradovicа 6, 21000 Novi Sad, Serbia
Zoran Mitrović orcid.org/0000-0001-7660-0844 ; University of Novi Sad, Faculty of Technical Sciences, Trg Dositejа Obradovicа 6, 21000 Novi Sad, Serbia

Abstract

The paper presents an application of the stochastic measurement approach for true RMS and power of noise. The instrument structure is based on two 2-bit flash analog-to-digital (A/D) converters whose inputs are the dithered noise, and on accumulation of the product of the converters’ outputs. New theoretical expressions for predicting measurement result and measurement uncertainty, with inclusion of input signal’s stochastic nature, are derived. Extensive simulations and experiments prove the validity of the proposed method and its low measurement uncertainty, even at a relatively low sampling rate. These indicate that, beside general applications for noise measurements, the instrument is suitable for chemical and biological substances detection that utilizes graphene sensors.

Keywords

digital measurements; measurement uncertainty; noise measurement; stochastic processes

Hrčak ID:

188224

URI

https://hrcak.srce.hr/188224

Publication date:

25.10.2017.

Article data in other languages: croatian

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