Title :
Miniature magnetic sensor with a high sensitivity and wide bandwidth
Author_Institution :
Dept. of Eng., Cambridge Univ., UK
fDate :
2/27/1997 12:00:00 AM
Abstract :
A miniature fluxgate magnetic sensor has been demonstrated with microtesla resolution, a dynamic range of four orders of magnitude and a frequency response extending from DC to 1 MHz. The sensor comprises a millimetre long solenoid winding with a thin amorphous metal core, excited by an RF source. The system is illustrated reading magnetic card data across a 0.25 mm air gap and non-contact monitoring of milliampere currents flowing in PCB tracks
Keywords :
fluxgate magnetometers; frequency response; magnetic sensors; printed circuit testing; solenoids; 0 to 1 MHz; 0.25 mm; PCB tracks; RF source; amorphous metal core; bandwidth; dynamic range; fluxgate magnetic sensor; frequency response; magnetic card data reading; microtesla resolution; milliampere currents; noncontact monitoring; solenoid winding;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19970264
