Publication

Single core fully integrated CMOS micro-fluxgate magnetometer

Radivoje Popovic, Pavel Kejik
2004
Journal Articles

Abstract

A new fully integrated 2D micro-fluxgate magnetometer is presented. This magnetometer is integrated in a standard CMOS process and uses a ferromagnetic core integrated on the chip by a photolithographic post-process compatible with the integrated circuit technology. The cross-shaped ferromagnetic core is placed diagonally above four excitation coils, two for each measurement axis. A novel electronic signal extraction technique is presented. The integrated 2D magnetometer exhibits a sensitivity of 160 V/T and a linear range of±50uT. The magnetic equivalent noise spectral density is 70 nT/√Hz at 1 Hz, and the total power consumption is as low as 17mWfor the 5V power supply.

Official source

https://infoscience.epfl.ch/entities/publication/0c581abd-80fb-46b4-be56-7d2adc7c1c9f

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Radivoje Popovic, Pavel Kejik
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/0c581abd-80fb-46b4-be56-7d2adc7c1c9f

About this result

Related concepts (32)

Integrated circuit

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, usually silicon. Large numbers of miniaturized transistors and other electronic components are integrated together on the chip. This results in circuits that are orders of magnitude smaller, faster, and less expensive than those constructed of discrete components, allowing a large transistor count.

Inductor

An inductor, also called a coil, choke, or reactor, is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. An inductor typically consists of an insulated wire wound into a coil. When the current flowing through the coil changes, the time-varying magnetic field induces an electromotive force (emf) (voltage) in the conductor, described by Faraday's law of induction. According to Lenz's law, the induced voltage has a polarity (direction) which opposes the change in current that created it.

Magnetometer

A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field. Other magnetometers measure the magnetic dipole moment of a magnetic material such as a ferromagnet, for example by recording the effect of this magnetic dipole on the induced current in a coil.

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Single core fully integrated CMOS micro-fluxgate magnetometer

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