A MINIATURIZED MAGNETIC-FIELD SENSOR SYSTEM CONSISTING OF A PLANAR FLUXGATE SENSOR AND A CMOS READOUT CIRCUITRY

Authors
GOTTFRIEDGOTTFRIED R BUDDE W JAHNE R KUCK H SAUER B ULBRICHT S WENDE U
Citation
R. Gottfriedgottfried et al., A MINIATURIZED MAGNETIC-FIELD SENSOR SYSTEM CONSISTING OF A PLANAR FLUXGATE SENSOR AND A CMOS READOUT CIRCUITRY, Sensors and actuators. A, Physical, 54(1-3), 1996, pp. 443-447
Citations number
4
Categorie Soggetti
Engineering, Eletrical & Electronic","Instument & Instrumentation
Journal title
Sensors and actuators. A, Physical → ACNP
ISSN journal
09244247
Volume
54
Issue
1-3
Year of publication
1996
Pages
443 - 447
Database
ISI
SICI code
0924-4247(1996)54:1-3<443:AMMSSC>2.0.ZU;2-L
Abstract
We report on a miniaturized magnetic-field sensor system consisting of a fluxgate sensor fabricated in CMOS-compatible planar technology and a CMOS-ASIC for sensor supply, readout and signal processing using th e second-harmonic principle with a feedback loop for zero-field operat ion. The system exhibits a sensitivity of 9.2 +/- 0.1 mV mu T-1 for a magnetic held range of +/- 90 mu T and a temperature range of 0 to 70 degrees C. The 3 dB bandwith is 300 Hz and a noise value of 30 nT Hz(- 1/2) has been estimated. Using 5 V supply voltage, the power consumpti on of the system is measured to be 160 mW.