Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: Provided is a magnetic field measuring apparatus, comprising: a magnetic sensor array including a plurality of magnetic sensor cells, which is capable of detecting an input magnetic field in three axial directions at a plurality of locations in three-dimensional space; a measurement data acquiring section for acquiring measurement data based on the input magnetic field including a to-be-measured magnetic field; and a measurement data computing section for calibrating the measurement data acquired by the measurement data acquiring section; wherein the measurement data computing section comprises: an indicator calculation section for calculating an indicator illustrating calibration accuracy of the measurement data computing section; and a failure determination section for determining a failure based on the indicator calculated by the indicator calculation section; wherein each of the plurality of magnetic sensor cells comprises: a magnetic sensor; and an output section for outputting a output signal.

Abstract: A magnetic field measurement apparatus including a magnetic sensor array having magnetic sensor cells capable of detecting magnetic fields in three axial directions arranged in three dimensions, each magnetic sensor cell including a plurality of magnetic sensors that each have a magnetoresistive element and a magnetic flux concentrator arranged at least at one of one end and another end of the magnetoresistive element; AD converters that respectively convert analog detection signals output by the magnetic sensors into digital measurement data; a magnetic field acquiring section that acquires the digital measurement data; a calibration computing section that calibrates the digital measurement data from the magnetic field acquiring section, using at least one of a main-axis sensitivity, cross-axis sensitivities, and an offset; and a gradient magnetic field computing section that calculates a gradient magnetic field using magnetic field measurement data resulting from the calibration of the digital measurement d

Abstract: Provided is a magnetic field measuring apparatus for: acquiring the measurement data measured by a magnetic sensor array that is configured by arraying the plurality of magnetic sensor cells to form a surface covering at least a part of a target object to be measured; performing signal separation on a magnetic field spatial distribution indicated by the measurement data based on a position and magnetic sensitivity of each magnetic sensor; generating a calibration magnetic field at a position on a straight line that can be drawn without crossing the plurality of magnetic sensor cells from the measurement space outside the measurement space; and calibrating a sensor error for the magnetic sensor based on a separation error in a case where signal separation has been performed on a spatial distribution of the calibration magnetic field.

Abstract: A magnetic field measurement apparatus including a magnetic sensor array having magnetic sensor cells capable of detecting magnetic fields in three axial directions arranged in three dimensions, each magnetic sensor cell including a plurality of magnetic sensors that each have a magnetoresistive element and a magnetic flux concentrator arranged at least at one of one end and another end of the magnetoresistive element; AD converters that respectively convert analog detection signals output by the magnetic sensors into digital measurement data; a magnetic field acquiring section that acquires the digital measurement data; a calibration computing section that calibrates the digital measurement data from the magnetic field acquiring section, using at least one of a main-axis sensitivity, cross-axis sensitivities, and an offset; and a gradient magnetic field computing section that calculates a gradient magnetic field using magnetic field measurement data resulting from the calibration of the digital measurement d

Abstract: Provided is a concentration measurement apparatus for measuring a concentration of a measurement object using an infrared ray, the concentration measurement apparatus including a signal acquisition unit configured to acquire a detection signal, a temperature information acquisition unit configured to acquire temperature information, a correction unit configured to output a correction signal obtained by correcting a temperature dependency of the detection signal based on the temperature information, and a calculation unit configured to calculate the concentration of the measurement object according to the correction signal using calibration curve data at a predetermined reference temperature for calculating the concentration of the measurement object, in which the correction unit is configured to output the correction signal obtained by performing linear correction of the detection signal using, among predetermined correction parameters different for three or more respective temperature segments, the correctio

Abstract: Provided is a magnetic field measuring apparatus for: acquiring the measurement data measured by a magnetic sensor array that is configured by arraying the plurality of magnetic sensor cells to form a surface covering at least a part of a target object to be measured; performing signal separation on a magnetic field spatial distribution indicated by the measurement data based on a position and magnetic sensitivity of each magnetic sensor; generating a calibration magnetic field at a position on a straight line that can be drawn without crossing the plurality of magnetic sensor cells from the measurement space outside the measurement space; and calibrating a sensor error for the magnetic sensor based on a separation error in a case where signal separation has been performed on a spatial distribution of the calibration magnetic field.

Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: A measurement apparatus is provided, which includes a magnetic sensor array formed by three-dimensionally arranging a plurality of magnetic sensor cells each including a magnetic sensor, and capable of detecting an input magnetic field in three axial directions; a measurement data acquiring section that acquires a plurality of measurement values based on the input magnetic field detected by the magnetic sensor array; a magnetic field calculating section that calculates the input magnetic field based on the measurement values; an error calculating section that calculates a detection error of the input magnetic field, based on the plurality of measurement values and a calculation result obtained by calculating the input magnetic field; and a measurement data selecting section that selects a plurality of measurement values to be used for calculating the input magnetic field by the magnetic field calculating section, from among the plurality of measurement values, based on the detection error.

Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: Provided is a magnetic field measuring apparatus for: acquiring the measurement data measured by a magnetic sensor array that is configured by arraying the plurality of magnetic sensor cells to form a surface covering at least a part of a target object to be measured; performing signal separation on a magnetic field spatial distribution indicated by the measurement data based on a position and magnetic sensitivity of each magnetic sensor; generating a calibration magnetic field at a position on a straight line that can be drawn without crossing the plurality of magnetic sensor cells from the measurement space outside the measurement space; and calibrating a sensor error for the magnetic sensor based on a separation error in a case where signal separation has been performed on a spatial distribution of the calibration magnetic field.

Abstract: A wiring substrate includes a core layer, first conductor layers including a first inner conductor layer, a first outer conductor layer and a first intermediate conductor layer, second conductor layers including a second inner conductor layer, a second outer conductor layer and a second intermediate conductor layer, and interlayer insulating layers interposed between the first conductor layers and between the second conductor layers. The first and/or second inner conductor layers has a first laminated structure including a metal foil layer and a plating film layer, the first and/or second outer conductor layers has the first laminated structure, and the first and/or second intermediate conductor layers has a second laminated structure including a metal foil layer and a plating film layer and includes a conductor pattern formed such that an upper surface of the conductor pattern has an edge portion forming an inclined portion inclined toward the core layer.

Abstract: A magnetic field measuring device that can measure a weaker magnetic field is provided. A magnetic field measuring device is provided, the magnetic field measuring device including: a sensor unit that has at least one magnetoresistive element; a reference voltage generating unit that outputs a reference voltage; a magnetic field generating unit that generates a magnetic field to be applied to the sensor unit; a feedback current generating unit that supplies, according to a difference between an output voltage of the sensor unit and the reference voltage, the magnetic field generating unit with a feedback current that generates a feedback magnetic field to diminish an input magnetic field to the sensor unit; a magnetic field measuring unit that outputs a measurement value corresponding to the feedback current; and an adjusting unit that uses the output voltage of the sensor unit to adjust the reference voltage.

Abstract: Provided is a magnetic field measurement device which includes a magnetic sensor array that is composed of a plurality of magnetic sensor cells, each of which has a magnetic sensor and an output unit for outputting an output signal, arranged at lattice points between two curved surfaces, each of which is bent in one direction, so as to be three-dimensionally arranged, and is capable of detecting an input magnetic field in three-axial directions, a measurement data acquisition unit configured to acquire measurement data measured by the magnetic sensor array, and a magnetic field reconstruction unit configured to reconstruct a magnetic field of a component orthogonal to a virtual sensor array plane with respect to one or more positions on the virtual sensor array plane, which is a plane specified in a three-dimensional space, using the measurement data.

Abstract: A wiring substrate includes a core layer, first conductor layers including first inner, outer and intermediate conductor layers, second conductor layers including second inner, outer and intermediate conductor layers, interlayer insulating layers interposed between the first conductor layers and between the second conductor layers, and via conductors formed in the core layer such that each via conductor decreases in diameter from one of the inner conductor layers toward the other one of the inner conductor layers and that the other one of the inner conductor layers has thickness greater than thickness of the one of the inner conductor layers. The first and/or second inner conductor layers includes a first laminated structure including metal foil and plating film layers, the first and/or second outer conductor layers includes the first laminated structure, and the first and/or second intermediate conductor layers includes a second laminated structure including metal foil and plating film layers.

Abstract: Provided is a magnetic field measuring apparatus, comprising: a magnetic sensor array including a plurality of magnetic sensor cells, which is capable of detecting an input magnetic field in three axial directions at a plurality of locations in three-dimensional space; a measurement data acquiring section for acquiring measurement data based on the input magnetic field including a to-be-measured magnetic field; and a measurement data computing section for calibrating the measurement data acquired by the measurement data acquiring section; wherein the measurement data computing section comprises: an indicator calculation section for calculating an indicator illustrating calibration accuracy of the measurement data computing section; and a failure determination section for determining a failure based on the indicator calculated by the indicator calculation section; wherein each of the plurality of magnetic sensor cells comprises: a magnetic sensor; and an output section for outputting a output signal.

Abstract: A wiring substrate includes a core layer, first conductor layers including first inner, outer and intermediate layers, second conductor layers including second inner, outer and intermediate layers, interlayer insulating layers interposed between the first conductor layers and between the second conductor layers, and via conductors formed in the insulating layers such that each via conductor connects two conductor layers and is integrally formed with one of the conductor layers on side away from the core layer. The first and/or second inner conductor layers has a first conductor layer structure including metal foil and plating film layers, the first and/or second outer conductor layers has the first structure, the first and/or second intermediate conductor layers has a second conductor layer structure including metal foil and plating film layers, and the via conductors include a group integrally formed with the first structure and including constricted via conductors each having a constricted portion.

Abstract: Provided is a magnetic field measuring apparatus for: acquiring the measurement data measured by a magnetic sensor array that is configured by arraying the plurality of magnetic sensor cells to form a surface covering at least a part of a target object to be measured; performing signal separation on a magnetic field spatial distribution indicated by the measurement data based on a position and magnetic sensitivity of each magnetic sensor; generating a calibration magnetic field at a position on a straight line that can be drawn without crossing the plurality of magnetic sensor cells from the measurement space outside the measurement space; and calibrating a sensor error for the magnetic sensor based on a separation error in a case where signal separation has been performed on a spatial distribution of the calibration magnetic field.

Abstract: The present invention relates to a hall electromotive force signal detection circuit and a current sensor thereof each of which is able to achieve excellent wide-band characteristics and fast response as well as high accuracy. A difference calculation circuit samples a component synchronous with a chopper clock generated by a chopper clock generation circuit, out of an output voltage signal of a signal amplifier circuit, at a timing obtained from the chopper clock, so as to detect the component. An integrating circuit integrates an output from the difference calculation circuit in the time domain. An output voltage signal from the integrating circuit is fed back to a signal amplifier circuit via a third transconductance element.

Abstract: A magnetic field measuring device that can measure a weaker magnetic field is provided. A magnetic field measuring device is provided, the magnetic field measuring device including: a sensor unit that has at least one magnetoresistive element; a reference voltage generating unit that outputs a reference voltage; a magnetic field generating unit that generates a magnetic field to be applied to the sensor unit; a feedback current generating unit that supplies, according to a difference between an output voltage of the sensor unit and the reference voltage, the magnetic field generating unit with a feedback current that generates a feedback magnetic field to diminish an input magnetic field to the sensor unit; a magnetic field measuring unit that outputs a measurement value corresponding to the feedback current; and an adjusting unit that uses the output voltage of the sensor unit to adjust the reference voltage.