About: Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers

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About: Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Magnetoresistors can replace induction sensors in applications like nondestructive testing and metal detection, where high spatial resolution or low frequency response is required. Using an AC excitation field the magnetic response of eddy currents is detected. Although giant magnetoresistive (GMR) sensors have higher measuring range and sensitivity compared to anisotropic magnetoresistors (AMR), they show also higher hysteresis and noise especially at low frequencies. Therefore AMR sensors are chosen to be evaluated in low noise measurements with combined processing of DC and AC excitation field with respect to the arrangement of processing electronics. Circuit with a commercial AMR sensor HMC1001 and AD8429 preamplifier has the noise of 125 pT/rtHz at 1 Hz using the flipping technique. Without the flipping, the noise combined with the 1/f noise of the amplifier results in 246 pT/rtHz at 1 Hz. Magnetoresistors can replace induction sensors in applications like nondestructive testing and metal detection, where high spatial resolution or low frequency response is required. Using an AC excitation field the magnetic response of eddy currents is detected. Although giant magnetoresistive (GMR) sensors have higher measuring range and sensitivity compared to anisotropic magnetoresistors (AMR), they show also higher hysteresis and noise especially at low frequencies. Therefore AMR sensors are chosen to be evaluated in low noise measurements with combined processing of DC and AC excitation field with respect to the arrangement of processing electronics. Circuit with a commercial AMR sensor HMC1001 and AD8429 preamplifier has the noise of 125 pT/rtHz at 1 Hz using the flipping technique. Without the flipping, the noise combined with the 1/f noise of the amplifier results in 246 pT/rtHz at 1 Hz. (en)
Title	Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers (en)
skos:prefLabel	Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers Low Frequency Noise of Anisotropic Magnetoresistors in AC-excited Magnetometers (en)
skos:notation	RIV/68407700:21230/12:00194968!RIV13-MSM-21230___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(GD102/09/H082), S
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Janošek, Michal Vyhnánek, Jan Ripka, Pavel
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta elektrotechnická
http://linked.open...dnocenehoVysledku	147492
http://linked.open...ai/riv/idVysledku	RIV/68407700:21230/12:00194968
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Magnetoresistors; magnetometers (en)
http://linked.open.../riv/klicoveSlovo	Magnetoresistors magnetometers
http://linked.open...ontrolniKodProRIV	[9066CF958EE8]
http://linked.open...in/vavai/riv/obor	JB
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Sensors and intelligent sensor systems
http://linked.open...UplatneniVysledku	2012
http://linked.open...iv/tvurceVysledku	Janošek, Michal Ripka, Pavel Vyhnánek, Jan
http://localhost/t...ganizacniJednotka	21230

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