Low-frequency noise in planar Hall effect bridge sensors

Publication: Research - peer-reviewJournal article – Annual report year: 2011

NullPointerException

View graph of relations

The low-frequency characteristics of planar Hall effect bridge sensors are investigated as function of the sensor bias current and the applied magnetic field. The noise spectra reveal a Johnson-like spectrum at high frequencies, and a 1/f-like excess noise spectrum at lower frequencies, with a knee frequency of around 400Hz. The 1/f-like excess noise can be described by the phenomenological Hooge equation with a Hooge parameter of γH=0.016. The detectivity is shown to depend on the total length, width and thickness of the bridge branches. The detectivity is improved by the square root of the length increase. Moreover, the detectivity is shown to depend on the amplitude of the applied magnetic field, revealing a magnetic origin to part of the 1/f noise.
Original languageEnglish
JournalSensors & Actuators: A. Physical
Publication date2011
Volume171
Journal number2
Pages212-218
ISSN09244247
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 5

Keywords

  • Detectivity, Magnetoresistance, Low-frequency noise, Planar Hall effect
Download as:
Download as PDF
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
PDF
Download as HTML
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
HTML
Download as Word
Select render style:
APAAuthorCBEHarvardMLAStandardVancouverShortLong
Word

ID: 5870865