Linearity of Pulse Excited Coil-Less Fluxgate

Butta, Mattia; Ripka, Pavel

doi:10.1109/tmag.2009.2024898

Cited by 5 publications

(2 citation statements)

References 15 publications

(13 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first kind includes the peak or amplitude detectors which are generally realized by diodes [ 7 – 16 ]. A second frequent kind, more sophisticated, uses traditional synchronous detection with commercial lock-in amplifiers [ 17 – 21 ], analog switches [ 22 , 23 ] or analog multipliers [ 17 , 24 – 26 ]. Other new categories of detectors like the Root-Mean-Square (RMS)-to-DC converters and the digital quadrature demodulators using a Software Defined Radio (SDR) have also been implemented in our recent works [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

High Frequency Amplitude Detector for GMI Magnetic Sensors

Asfour

Zidi

Yonnet

2014

Sensors

View full text Add to dashboard Cite

A new concept of a high-frequency amplitude detector and demodulator for Giant-Magneto-Impedance (GMI) sensors is presented. This concept combines a half wave rectifier, with outstanding capabilities and high speed, and a feedback approach that ensures the amplitude detection with easily adjustable gain. The developed detector is capable of measuring high-frequency and very low amplitude signals without the use of diode-based active rectifiers or analog multipliers. The performances of this detector are addressed throughout the paper. The full circuitry of the design is given, together with a comprehensive theoretical study of the concept and experimental validation. The detector has been used for the amplitude measurement of both single frequency and pulsed signals and for the demodulation of amplitude-modulated signals. It has also been successfully integrated in a GMI sensor prototype. Magnetic field and electrical current measurements in open- and closed-loop of this sensor have also been conducted.

show abstract

Section: Introductionmentioning

confidence: 99%

High Frequency Amplitude Detector for GMI Magnetic Sensors

Asfour

Zidi

Yonnet

2014

Sensors

View full text Add to dashboard Cite

show abstract

“…It is known that discontinuities in the excitation increase the fluxgate noise. However, existing literature [2][3][4][5][6][7] does not suggest thorough quantitative analysis of this phenomenon. In this study, we bridge this gap and analyze the noise level of an orthogonal fluxgate employing discontinuous excitation.…”

Section: Introductionmentioning

confidence: 99%

Orthogonal fluxgate employing discontinuous excitation

Weiss

Paperno

Plotkin

2010

Journal of Applied Physics

View full text Add to dashboard Cite

In this work, we suggest a new method for the reduction of the power consumption of an orthogonal fluxgate employing an amorphous wire. In order to reduce the power consumption, we introduce idle intervals in the fluxgate excitation. In fluxgates where the excitation current is applied directly to the wire core, the excitation wave form can easily be manipulated due to the very small impedance of the wire core. The resulted discontinuities in the excitation increase the fluxgate noise by a factor of about 3.5. In order to eliminate this excess noise, we simply discard the data related to the excitation idle intervals from the signal processing of the fluxgate output. As a result, we have reduced the fluxgate power consumption by a factor of 16, from 6.4 mW at 100% duty cycle down to 0.4 mW at 6.25% duty cycle. It is important to note that the reduction of power consumption is obtained without decreasing the fluxgate resolution.

show abstract