scholarly journals Magnetic noise contribution of the ferromagnetic core of induction magnetometers

2015 ◽  
Vol 4 (1) ◽  
pp. 229-237 ◽  
Author(s):  
C. Coillot ◽  
M. El Moussalim ◽  
E. Brun ◽  
A. Rhouni ◽  
R. Lebourgeois ◽  
...  
Keyword(s):  
Electronic Circuit ◽  
Low Voltage ◽  
Complex Permeability ◽  
Experimental Measurements ◽  
Magnetic Noise ◽  
Sensor Noise ◽  
Noise Sources ◽  
Ferromagnetic Core ◽  
Induction Sensor ◽  
Noise Contribution

Abstract. The performance of induction magnetometers, in terms of resolution, depends both on the induction sensor and the electronic circuit. To investigate accurately the sensor noise sources, an induction sensor, made of a ferrite ferromagnetic core, is combined with a dedicated low voltage and current noise preamplifier, designed in CMOS 0.35 μm technology. A modelling of the contribution of the ferromagnetic core to the noise through the complex permeability formalism is performed. Its comparison with experimental measurements highlight another possible source for the dominating noise near the resonance.

scholarly journals New ferromagnetic core shapes for induction sensors

2014 ◽  
Vol 3 (1) ◽  
pp. 1-8 ◽  
Author(s):  
C. Coillot ◽  
J. Moutoussamy ◽  
M. Boda ◽  
P. Leroy
Keyword(s):  
Experimental Validation ◽  
Low Voltage ◽  
Industrial Applications ◽  
Magnetic Sensors ◽  
Input Noise ◽  
Ferromagnetic Core ◽  
Wide Range ◽  
Current Input ◽  
Giant Magneto Impedance ◽  
Induction Sensor

Abstract. Induction sensors are used in a wide range of scientific and industrial applications. One way to improve these is rigorous modelling of the sensor combined with a low voltage and current input noise preamplifier aiming to optimize the whole induction magnetometer. In this paper, we explore another way, which consists in the use of original ferromagnetic core shapes of induction sensors, which bring substantial improvements. These new configurations are the cubic, orthogonal and coiled-core induction sensors. For each of them we give modelling elements and discuss their benefits and drawbacks with respect to a given noise-equivalent magnetic induction goal. Our discussion is supported by experimental results for the cubic and orthogonal configurations, while the coiled-core configuration remains open to experimental validation. The transposition of these induction sensor configurations to other magnetic sensors (fluxgate and giant magneto-impedance) is an exciting prospect of this work.

Effect of Complex Permeability on Circuit Parameters of CPW with Magnetic Noise Suppression Sheet

2020 ◽  
Vol E103.B (9) ◽  
pp. 899-902
Author(s):  
Sho MUROGA ◽  
Motoshi TANAKA ◽  
Takefumi YOSHIKAWA ◽  
Yasushi ENDO
Keyword(s):  
Noise Suppression ◽  
Complex Permeability ◽  
Magnetic Noise

Imaging magnetic noise sources in magnetic recording heads (Invited Paper)

2005 ◽  
Author(s):  
Lu Yuan ◽  
Jian-Xiang Shen ◽  
Bharat B. Pant ◽  
Sy-Hwang Liou
Keyword(s):  
Magnetic Recording ◽  
Magnetic Noise ◽  
Noise Sources ◽  
Recording Heads ◽  
Magnetic Recording Heads

scholarly journals Analytical Models Synthesis of Power Electronic Converters

2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Achour Ales ◽  
Jean-Luc Schanen ◽  
Djelloul Moussaoui ◽  
James Roudet
Keyword(s):  
Mathematical Models ◽  
Analytical Model ◽  
Analytical Models ◽  
Electrical Network ◽  
Equivalent Circuits ◽  
Experimental Measurements ◽  
Power Electronic ◽  
Power Electronic Converters ◽  
Noise Sources ◽  
Harmonic Noise

In this paper we proposes a synthesis of different mathematical models of power electronic converters based on Thevenin/Norton equivalent circuits. Those models, composed by impedances and harmonic noise sources, are helpful to predict the conducted ElectroMagnetic Interferences (EMI) generated by converters connected to the electrical network. Moreover, the extracted impedances are determining for sizing EMC filters. The proposed analytical model is tested with PSpice simulations and validated by experimental measurements, from DC frequency until 30MHz.

scholarly journals Experimental measurements for evaluation of the network throughput of the RC4 channel in the in-home PLC network

2019 ◽  
Vol 70 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Rastislav Róka
Keyword(s):  
Main Part ◽  
Network Throughput ◽  
Detailed Knowledge ◽  
Experimental Measurements ◽  
Transmission Channel ◽  
Reference Channel ◽  
Noise Sources ◽  
Transmission Parameters ◽  
Phase Conductors ◽  
Channel Properties

Abstract For the expansion of in-home PLC networks, it is necessary to have a detailed knowledge of the PLC transmission channel properties. This contribution shortly discusses theoretical characteristics of the RC4 reference channel. A main part is focused on the network throughput and on the interphase PLC signal liaising presented in the RC4 reference channel for higher frequencies than 10 MHz. For evaluation of considered transmission parameters, experimental measurements related to various noise sources and to interactions between different phase conductors are realized in the real in-home PLC network.

Environmental UV-A Level Monitoring Using an Ag-TiO2 Schottky Diode

2013 ◽  
Vol 543 ◽  
pp. 113-116 ◽  
Author(s):  
Mehdi Mohamadzade Lajvardi ◽  
Farhad Akbari Boroumand
Keyword(s):  
Monitoring System ◽  
Schottky Diode ◽  
Electronic Circuit ◽  
Low Voltage ◽  
Schottky Diodes ◽  
Maximum Sensitivity ◽  
Uv Spectrum ◽  
Visible Blind ◽  
Level Monitoring

Here, we demonstrate the field applicability of the Ag-TiO2 Schottky diodes for environmental UV level measurements. The device is visible-blind and it is shown that its maximum sensitivity coincides the environmental UV spectrum (UV-A). These features, along with its low voltage and biasing insensitivity of its operation, simplify the electronic circuit required for the fabrication of a hand-held UV monitoring system.

Sign in / Sign up

Export Citation Format

Share Document