Ultralow-Frequency Noise in High-Bias Precision DC-Coupled Voltage Measurements

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F25%3A00389635" target="_blank" >RIV/68407700:21230/25:00389635 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1109/I2MTC62753.2025.11079148" target="_blank" >https://doi.org/10.1109/I2MTC62753.2025.11079148</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1109/I2MTC62753.2025.11079148" target="_blank" >10.1109/I2MTC62753.2025.11079148</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Ultralow-Frequency Noise in High-Bias Precision DC-Coupled Voltage Measurements

Popis výsledku v původním jazyce

In research on magnetic sensors and magnetometers (and not only in this field), there is often a need for precise measurement of small voltage variations under high bias or common-mode conditions. These variations are typically at low or ultralow frequencies (ULF, 1 mHz-1 Hz). As the noise of analog-to-digital (AD) and digital-to-analog converters (DA) are scaled with higher values of direct-current bias, we investigate the noise limits of direct measurement and also the ULF noise of voltage references and DA converters suitable for subtracting the large DC bias. We characterized several low-noise references and two D/A converters, with the help of a Weston cell as a DC bias source with ultimately low ultralow-frequency noise. We conclude that a 12-bit DAC with a recently introduced voltage reference is finally able to achieve noise below 0.1 ppm/root Hz at 0.1 Hz.

Název v anglickém jazyce

Ultralow-Frequency Noise in High-Bias Precision DC-Coupled Voltage Measurements

Popis výsledku anglicky

In research on magnetic sensors and magnetometers (and not only in this field), there is often a need for precise measurement of small voltage variations under high bias or common-mode conditions. These variations are typically at low or ultralow frequencies (ULF, 1 mHz-1 Hz). As the noise of analog-to-digital (AD) and digital-to-analog converters (DA) are scaled with higher values of direct-current bias, we investigate the noise limits of direct measurement and also the ULF noise of voltage references and DA converters suitable for subtracting the large DC bias. We characterized several low-noise references and two D/A converters, with the help of a Weston cell as a DC bias source with ultimately low ultralow-frequency noise. We conclude that a 12-bit DAC with a recently introduced voltage reference is finally able to achieve noise below 0.1 ppm/root Hz at 0.1 Hz.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

2025 IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2025)

ISBN

979-8-3315-0501-1

ISSN

2642-2069

e-ISSN

—

Počet stran výsledku

5

Strana od-do

—

Název nakladatele

IEEE

Místo vydání

Piscataway

Místo konání akce

Chemnitz

Datum konání akce

19. 5. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001554207900214