Nothing Special   »   [go: up one dir, main page]

Li et al., 2020 - Google Patents

Ultralow noise low offset chopper amplifier for induction coil sensor to detect geomagnetic field of 1 mHz to 1 kHz

Li et al., 2020

Document ID
13146029288791393005
Author
Li J
Xi Z
Chen X
Wang H
Long X
Zhou S
Wang L
Publication year
Publication venue
Journal of Environmental and Engineering Geophysics

External Links

Snippet

An induction coil sensor (ICS) is important for measuring low-frequency (DC-1kHz) geomagnetic field. The accuracy of the preamplifier is one key factor determining the performance of the sensor. But the preamplifier is susceptible to 1/f noise, offset voltage and …
Continue reading at library.seg.org (other versions)

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices, e.g. Hall effect devices; using magneto-resistive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • G01R33/035—Measuring direction or magnitude of magnetic fields or magnetic flux using superconductive devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants; Measuring impedance or related variables
    • G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
    • G01N27/9046—Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING; COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00 and G01R33/00 - G01R35/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832—Specific tests of electronic circuits not provided for elsewhere

Similar Documents

Publication Publication Date Title
Dufay et al. Characterization of an optimized off-diagonal GMI-based magnetometer
D’amico et al. Low-voltage low-power integrated analog lock-in amplifier for gas sensor applications
Scandurra et al. Differential ultra low noise amplifier for low frequency noise measurements
Li et al. Ultralow noise low offset chopper amplifier for induction coil sensor to detect geomagnetic field of 1 mHz to 1 kHz
Scandurra et al. A review of design approaches for the implementation of low-frequency noise measurement systems
Shi et al. Optimal design of low-noise induction magnetometer in 1 mHz–10 kHz utilizing paralleled dual-JFET differential pre-amplifier
Mishonov et al. Simple do-it-yourself experimental set-up for electron charge qe measurement
Yan et al. Equivalent input magnetic noise analysis for the induction magnetometer of 0.1 mHz to 1 Hz
Setiadi et al. Sideband sensitivity of fluxgate sensors theory and experiment
Vopálenský et al. Wattmeter with AMR sensor
Liu et al. Design and implementation of a tuning-matching framework for a high-sensitivity broad band proton precession magnetometer sensing coil
Hagh et al. A wideband, sensitive current sensor employing transimpedance amplifier as interface to Rogowski coil
Li et al. Journal of Environmental and Engineering Geophysics
Nording et al. Measurement system for temperature dependent noise characterization of magnetoresistive sensors
Muñoz et al. Active power analog front-end based on a Wheatstone-type magnetoresistive sensor
Li et al. A novel modem model insensitive to the effect of the modulated carrier and the demodulated-signal phase adapted for capacitive sensors
Ozaki et al. Equivalent circuit model for the electric field sensitivity of a magnetic search coil of space plasma
Setiadi et al. Inductance analyzer based on auto-balanced circuit for precision measurement of fluxgate impedance
Jonker et al. Automated system for noise-measurements on low-ohmic samples and magnetic sensors
Joshi et al. A 6.5-$\mu\text {W} $/MHz Charge Buffer With 7-fF Input Capacitance in 65-nm CMOS for Noncontact Electropotential Sensing
Tang et al. Low-noise chopper amplifier design for low-frequency induction magnetometers
Renhart et al. Hidden metallic object localization by using giant magnetic resistor sensors
Gu et al. Research on the excitation method of symmetrical spiral online detecting sensor of metal debris
Gopman et al. A digitally configurable measurement platform using audio cards for high-resolution electronic transport studies
Eriksson et al. An HTS SQUID picovoltmeter used as preamplifier for Rogowski coil sensors