Title :
Switching-mode fluxgate
Author :
Ripka, P. ; Hurley, W.G.
Author_Institution :
Czech Tech. Univ., Prague, Czech Republic
Abstract :
Fluxgate sensors require high excitation currents to achieve low perming and low noise. Parallel resonant excitation circuit supplied from current source is used in order to reduce the excitation power. We show that it is possible to use serial resonance circuit for this purpose. The shape of the resonance current peak is not dependent on the voltage waveform. The main advantage of serial resonant circuit is that it can be excited by simple switching circuit powered by low voltage source.
Keywords :
constant current sources; fluxgate magnetometers; magnetic sensors; switching circuits; current source; excitation currents; excitation power; fluxgate sensors; low voltage source; parallel resonant excitation circuit; resonance current peak; serial resonance circuit; simple switching circuit; switching-mode fluxgate; voltage waveform; Current supplies; Frequency; Magnetic cores; Magnetic field measurement; Magnetic resonance; Magnetic sensors; Magnetometers; RLC circuits; Switching circuits; Voltage;
Conference_Titel :
TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7731-1
DOI :
10.1109/SENSOR.2003.1217007
