Tehnički vjesnik, Vol. 24 No. 5, 2017.
Izvorni znanstveni članak
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
Sažetak
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.
Ključne riječi
digital measurements; measurement uncertainty; noise measurement; stochastic processes
Hrčak ID:
188224
URI
Datum izdavanja:
25.10.2017.
Posjeta: 2.478 *