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Class 324/117R - Magnetic saturation (e.g., in field or in amplifier)


Subclass of Class 324 - Electricity: measuring and testing
Definition: Subject matter having magnetic means in which a significant
No. of patents: 623
Last issue date: 02/07/2012


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NumberTitleIssue Date
8111059Electric current locator
The disclosure herein provides an apparatus for location of a quantity of current vectors in an electrical device, where the current vector has a known direction and a known relative magnitude to an input current supplied to the electrical device. Mathematical const...
02/07/2012
8089265MTJ sensor including domain stable free layer
By subdividing the free layer of a GMR/TMR device into multiple sub-elements that share common top and bottom electrodes, a magnetic detector is produced that is domain stable in the presence of large stray fields, thereby eliminating the need for longitudinal bias ...
01/03/2012
8018221Apparatus for measuring an electric current flowing through an electrical conductor
An apparatus for measuring an electric current flowing through an electrical conductor (1), comprising a measuring device which detects a magnetic field formed by the electrical conductor in three orthogonal spatial directions and supplies measurement signals...
09/13/2011
7990132Current sensor including an integrated circuit die including a first and second coil
A current sensor includes a coils located within the integrated circuit die and inductively coupled to a conductor located in the integrated circuit package holding the die. The inductors sense the current in the conductor and supply the sensed signal to an integrat...
08/02/2011
7973527Electronic circuit configured to reset a magnetoresistance element
An electronic circuit includes a magnetoresistance element for providing an output signal proportional to a magnetic field. The magnetoresistance element also has a hysteresis characteristic. The electronic circuit also includes at least one of a reset conductor or ...
07/05/2011
7969139Rogowski sensor and method for measuring a current
A Rogowski sensor is provided for measuring a current of an electrical conductor. The sensor has a Rogowski coil, which has an electrical winding resistor, and an integration device which is connected to the Rogowski coil and is intended to generate an output signal...
06/28/2011
7952345Inverted magnetic isolator
A current determiner comprising a first input conductor and a first current sensor, formed of a p.lurality of magnetoresistive, anisotropic, ferromagnetic thin-film layers at least two of which are separated from one another by a nonmagnetic layer positioned therebe...
05/31/2011
7915885Sensor system and method
A sensing system includes a conductor with a current flow path therethrough. A first location of the conductor defines a first cross-sectional area and a second location defines a second cross-sectional area, wherein a current flowing through the conductor establish...
03/29/2011
7906955On-chip current sensing methods and systems
A switch regulator module includes a switch and a current sensing module. The switch has an input port and an output port. The current sensing module senses a first voltage at the input port of the switch and a second voltage at the output port of the switch. The cu...
03/15/2011
7902811Current sensor
The present invention provides a current sensor of smaller and simpler configuration, capable of measuring a current to be detected with high precision and stability. A current sensor has a V-shaped conductor line and a pair of magnetoresistive elements disposed alo...
03/08/2011
7902812Rogowski coil assembly and methods
A Rogowski coil assembly includes a first Rogowski coil that surrounds a conductor and generates a first voltage output signal. A second Rogowski coil also surrounds the conductor. The second Rogowski coil generates a second voltage output signal. A relay device com...
03/08/2011
7898240Current measuring apparatus
The present invention provides a current measuring apparatus having an improved structure to inhibit the possible adverse effect of a current in a different phase and the possible generation of an induced electromotive force caused by a measurement target current, e...
03/01/2011
7863886Method for determining the resonant frequency(s) of an energized power line carrier line (wave) trap
A method for testing a line trap of the type whose blocking characteristics are a function of its resonant frequencies without requiring the line trap to be de-energized along with the transmission line to which the trap is connected by injecting a signal into the t...
01/04/2011
7821253Direct current measuring device having magnetic sensors for current generated magnetic fields
A direct current measuring device having at least one first magnetic sensor and at least one second magnetic sensor sensitive to a magnetic field generated by an electric current flowing in a conductor. The measuring device includes a processing unit connected to th...
10/26/2010
7821251Current sensor
A current sensor includes a sensing circuit for sensing current and supplying indications thereof. The current sensor also includes two or more output terminals coupled to the sensing circuit that alternately supply respective indications of the sensed current accor...
10/26/2010
7808229Magnetic device and frequency analyzer
A magnetic device and a frequency analyzer are provided as those industrially utilizing a resonance phenomenon of a direction of magnetization of a magnetoresistive element. Since polarities of an alternating current i vary with time, the direction of magnetization ...
10/05/2010
7750620MTJ sensor based method to measure an electric current
By subdividing the free layer of a GMR/TMR device into multiple sub-elements that share common top and bottom electrodes, a magnetic detector is produced that is domain stable in the presence of large stray fields, thereby eliminating the need for longitudinal bias ...
07/06/2010
7746056Integrated sensor
An electronic circuit includes a substrate having a surface and a device supported by the surface of the substrate. The electronic circuit also includes a magnetic field transducer disposed over the surface of the substrate and an insulating layer disposed between t...
06/29/2010
7737678Magnetic sensor and current sensor
A current sensor capable of detecting current magnetic fields generated by a current to be detected with high precision and stability while realizing a compact configuration is provided. The current sensor includes: a conductor generating a current magnetic field in...
06/15/2010
7719257Current sensing module and assembly method thereof
A current sensing module for disposal proximate a conductor is disclosed. The current sensing module includes a housing having a first section and a second section that together define an opening for receiving the conductor therethrough. The second section is in ope...
05/18/2010
7705583Micro-electromechanical system (MEMS) based current and magnetic field sensor
A micro-electromechanical system (MEMS) current and magnetic field sensor for sensing a magnetic field produced by a conductor includes a magneto-MEMS component for sensing the magnetic field and an interference-MEMS component for sensing an interference, wherein th...
04/27/2010
7667452Detector circuit for measuring current
Detector circuit for measuring relatively strong currents including a main current transformer (1) and two substantially identical auxiliary current transformers (2, 3) where a main current (I1) induces magnetomotive forces in said main curr...
02/23/2010
7663358Current sensor and molding method thereof
A current sensor which can measure accurately current of a wide range, at low cost. A C-shaped shield plate is positioned around a flow direction of a current of the bus bar. When the current flows through the bus bar, magnetic flux density of a magnetic field is ge...
02/16/2010
7626376Electric current detector having magnetic detector
An electric current detector has a bus bar with a current direction changing section for changing a direction of electric current through the bus bar, and a magnetic detector disposed in the current direction changing section of the bus bar. The current direction ch...
12/01/2009
7589517Adaptive slope compensation for switching regulators
A system, method, and apparatus are arranged to provide adaptive slope compensation in a switching regulator that includes an inductor. A control loop of the switching regulator is responsive to a ramp signal. A ramp generator that includes a capacitor circuit and a...
09/15/2009
7583073Core-less current sensor
Core-less current sensor comprises two parallel conductors carrying equal currents in the same direction. The magnetic field in mid location of the two parallel conductors carrying equal currents in the same direction for all current magnitudes is zero in absence of...
09/01/2009
7579824High-precision Rogowski current transformer
A high-precision Rogowski current transformer, the Rogowski coil is realized in a single printed circuit board while maintaining both the outside field rejection of a traditional Rogowski coil, and the increased output voltage similar to the multiple printed circuit...
08/25/2009
7567074Measuring device for measuring differential current, trip module comprising one such measuring device and switchgear unit having one such module
A device for measuring differential current designed to measure differential current in at least two current lines, comprising a first magnetic circuit designed to surround the current lines, forming a primary circuit of a transformer, a first secondary winding woun...
07/28/2009
7564233Shielded Rogowski coil assembly and methods
Shielded Rogowski coil systems having separate interface cables and methods for eliminating and monitoring noise in signal transmissions over the cables. An embodiment of a Rogowksi coil system includes a first Rogowski coil surrounding a conductor and generating a ...
07/21/2009
7557562Inverted magnetic isolator
A current determiner comprising a first input conductor and a first current sensor, formed of a plurality of magnetoresistive, anisotropic, ferromagnetic thin-film layers at least two of which are separated from one another by a nonmagnetic layer positioned therebet...
07/07/2009
7538540Bus bar current detecting apparatus
A current detecting portion A includes a magnetic shield attached to a bus bar BU, a magnetic shield attached to a bus bar BV, and a magnetic shield attached to a bus bar BW. On bus bars BV, BU and BW arranged in parallel, current sensors SU, SV and SW are arranged ...
05/26/2009
7528592Magnetoresistive sensor for current sensing
A system for sensing current in one or more first electrical conductors includes a frame and a retainer configured to receive the one or more first electrical conductors and constrain relative movement between the one or more first electrical conductors and the fram...
05/05/2009
7525300Current measuring device and method
A current measuring device measures the current flowing through each conductor which connects a power supply with a motor. Coreless current sensors are arranged between pairs of the conductors. Coefficients which represent a relationship between a fixed standard cur...
04/28/2009
7518354Multi-substrate integrated sensor
An electronic circuit includes a first substrate having a first substrate surface and a device supported by the first substrate surface. The device is selected from among a passive electronic component and an active electronic component. The electronic circuit also ...
04/14/2009
7511471Magnetic bridge electric power sensor
A magnetic bridge power sensor including a magnetic bridge having plural magnetic circuits, an excitation coil to generate a magnetic flux in one of the magnetic circuits, and a magnetic flux detection coil to detect the magnetic flux in one of the magnetic circuits...
03/31/2009
7508188On-chip current sensing methods and systems
A switch regulator module includes a switch and a current sensing module. The switch has an input port and an output port. The current sensing module senses a first voltage at the input port of the switch and a second voltage at the output port of the switch. The cu...
03/24/2009
7504820Current sensor with alternating magnetic excitation
A current measurement device includes a current sensor including a magnetic circuit, a plurality of windings including at least one excitation winding charged with the excitation of the magnetic circuit, and at least one detection winding. The sensor is equipped wit...
03/17/2009
7501808Current sensing device
A magnetic core is shaped in a ring having a gap and disposed to surround a conductive wire. When an electric current flows in the conductive wire, a magnetic field is generated in the gap. A sensor package includes a Hall element and a lead frame, which are embedde...
03/10/2009
7479778Adaptive slope compensation for switching regulators
A system, method, and apparatus are arranged to provide adaptive slope compensation in a switching regulator that includes an inductor. A control loop of the switching regulator is responsive to a ramp signal. A ramp generator that includes a capacitor circuit and a...
01/20/2009
7463016Current sensor
A current sensor includes a conductor line, and a magnetic sensor in which resistance value changes according to a current magnetic field produced by a current to be detected flowing through the conductor line. The conductor line includes: a pair of parallel portion...
12/09/2008
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