Digitalization of highly precise fluxgate magnetometers

Cerman, A.; Kuna, Alexander; Ripka, Pavel; Merayo, José M.G.

doi:10.1016/j.sna.2005.03.053

Cited by 17 publications

(10 citation statements)

References 5 publications

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“…However, many sensors still remain as an analog method, although many studies have proposed various ways for sensor circuit digitalization since the early 90s [1]- [6]. The reason is that conventional types of ADCs employed in the studies are not very appropriate for universal sensor applications, because they have to use some sort of analog circuit as the heart of the ADCs.…”

Section: Introductionmentioning

confidence: 99%

All-digital TAD-OFDM detection for sensor interface using TAD-digital synchronous detection

Watanabe

Terasawa

2010

2010 17th IEEE International Conference on Electronics, Circuits and Systems

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An all-digital TAD-OFDM detection method for sensor interface with digital synchronous detection based on TAD (Time AID converter)-type ADC is introduced. A TAD basic structure is a completely digital circuit including a ring delay-line (RDL) with delay units (DUs) driven by an input voltage Vio and an RDL frequency counter, latch and encoder. Since the operating principle is to count the number of DUs through which the delay pulse passes within a sampling period T., this ADC (TAD) naturally performs as a Vio voltage integration circuit for T •. Hence, high frequency noises can be removed simultaneously with AID conversion. First, as an example of a voltage-integration effect as a low-pass tiIter, magnet pick-Up sensing was verified using a 22-bit TAD test chip fabricated using a 0.65-Jlm CMOS with 106 JlV/LSB (100 kS/s). Next, the idea of digital synchronous detection with TAD (called TAD-DSD with the voltage-integration effect) is proposed. Finally, by using the TAD-DSD principle, TAD OFDM detection is presented and experimentally confirmed, resulting in signal-detection of each wave-amplitude from a four-carrier-composite wave, which consists of frequencies, 1.6-, 3.2-, 6.4-and 12.8-MHz, respectively.

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Section: Introductionmentioning

confidence: 99%

All-digital TAD-OFDM detection for sensor interface using TAD-digital synchronous detection

Watanabe

Terasawa

2010

2010 17th IEEE International Conference on Electronics, Circuits and Systems

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“…Nishio et al investigated sensitivity, offset and noise in a wide-temperature range [31]: with a ceramic core bobbin, the offset variations were below in the C to C range. Digital fluxgate magnetometers [32] use two basic approaches, which can be combined: -replacing the analog synchronous detector by digital signal processing; -replacing the analog feedback loop by a delta-sigma or some other digital feedback scheme. Digital magnetometers still do not achieve the parameters of the top analog magnetometers [33], but they are very flexible and allow for the future integration of electronics into a single ASIC chip.…”

Section: Fluxgate Sensorsmentioning

confidence: 99%

Advances in Magnetic Field Sensors

2010

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Abstract-The most important milestone in the field of magnetic sensors was when AMR sensors started to replace Hall sensors in many applications where the greater sensitivity of AMRs was an advantage. GMR and SDT sensors finally found applications. We also review the development of miniaturization of fluxgate sensors and refer briefly to SQUIDs, resonant sensors, GMIs, and magnetomechanical sensors.

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“…A good review of fluxgate sensors was given by Ripka (1992), and its basic sensor configuration and operating principle was also given by Ripka (2003). The latest developments of fluxgate sensors are in digitalization (Cerman et al, 2005), miniaturization (Baschirotto et al, 2007) and in the orthogonal fluxgate (Zorlu et al, 2007).…”

Section: Magnetic Sensorsmentioning

confidence: 99%

Magnetic Sensors for Navigation Applications: An Overview

Wang

2013

J. Navigation

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This paper reviews currently existing electronic magnetic sensor technologies for navigation applications. Magnetic compasses have been used in navigation for centuries. The Earth's geomagnetic field is considered to provide accurate, reliable and economically available information for orientation. Meanwhile, modern magnetometers and compass calibration technologies have allowed the electronic compass to become a crucial navigation tool, even in times of modern satellite navigation using Global Navigation Satellite Systems (GNSS). Magnetic sensor technologies, error modelling and compensating approaches have been reviewed in this paper. Current trends and the outlook for future development of the electronic compass are analysed.

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Digitalization of highly precise fluxgate magnetometers

Cited by 17 publications

References 5 publications

All-digital TAD-OFDM detection for sensor interface using TAD-digital synchronous detection

All-digital TAD-OFDM detection for sensor interface using TAD-digital synchronous detection

Advances in Magnetic Field Sensors

Magnetic Sensors for Navigation Applications: An Overview

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