Abstract: An apparatus and a method of determining a status of a cover of a display terminal are provided. The apparatus includes a terminal comprising a display screen, and a Hall sensor comprising a magnetic field sensing surface and a plurality of Hall elements disposed substantially parallel with the magnetic field sensing surface, the magnetic field sensing surface being substantially perpendicular to the display screen.

Abstract: An apparatus and method for the measurement of a resistance of a switching contact of an electrical circuit breaker. A first resistance value across the circuit breaker is determined while the circuit breaker is grounded at both sides and the switching contact is closed. Further, a second resistance value across the circuit breaker is determined while the circuit breaker is grounded at both sides and the switching contact is open. The resistance of the closed switching contact is then determined based on the first resistance value and the second resistance value.

Abstract: A system may include two input terminals, e.g., HI and LO, and a floating circuit that is physically separate from the input terminals and includes a gain amplifier. The floating circuit can be surrounded by a conductive enclosure that is electrically connected to the second input terminal. The floating circuit can further switch between input signals received from the first and second input terminals to the gain amplifier and the floating circuit ground.

Abstract: An XMR angle sensor arrangement with a safety mechanism comprises an XMR angle sensor having a sensing area for sensing an in-plane magnetic field and for outputting a sensor signal based on the in-plane magnetic field component sensed in the sensing area; a permanent magnet, which is rotatably arranged with respect to the XMR angle sensor to generate a first in-plane magnetic field component in the sensing area of the XMR angle sensor; an excitation current rail path, which is arranged proximate to the sensing area of the XMR angle sensor; and an excitation current provider configured to provide the excitation current rail path with an excitation signal having a excitation signal strength, wherein the excitation signal strength of the excitation signal is chosen to generate a second in-plane magnetic field component in the sensing area of the XMR angle sensor which results, due to a super position of the first and second in-plane magnetic field components, in an expected change of the direction of the result

Abstract: Methods and apparatus for measuring the cleanliness of molten metals. Direct current is passed between electrodes through molten metal advancing through a passage in an electrically resistive wall. A voltage signal is analyzed for the presence of solid generally non-metallic inclusions in the metal. Direct current is supplied by one or more ultra-capacitors and the decay in discharge voltage of the capacitor(s) is compensated for by passing the current from each capacitor through a resistor ladder network circuit having resistors connected in parallel. Individual resistors are switched on or off in a sequence effective to change the resistance of the circuit and maintain the current within a predetermined range. Heat generation and noise pick-up are minimized by maintaining a low discharge voltage and measurement current while using FETs only in the fully ON or OFF conditions to switch the resistors into or out of the circuits.

Abstract: The invention relates to an apparatus and method for tracking energy consumption. An energy tracking system comprises at least one switching element, at least one inductor and a control block to keep the output voltage at a pre-selected level. The switching elements are configured to apply the source of energy to the inductors. The control block compares the output voltage of the energy tracking system to a reference value and controls the switching of the switched elements in order to transfer energy for the primary voltage into a secondary voltage at the output of the energy tracking system. The electronic device further comprises an ON-time and OFF-time generator and an accumulator wherein the control block is coupled to receive a signal from the ON-time and OFF-time generator and generates switching signals for the at least one switching element in the form of ON-time pulses with a constant width ON-time.

Abstract: A method and system for a device with a magnetic sensor includes a first permanent magnet and a second permanent magnet. The first permanent magnet and the second permanent magnet of the magnetic sensor have at least one alternating ferromagnetic (FM) layer and antiferromagnetic (AFM) layer. The first permanent magnet is magnetized in a first direction and the second permanent magnet is magnetized in a second direction which is substantially orthogonal to the first direction. The blocking temperature of the AFM layer of the first permanent magnet is higher than the blocking temperature of the AFM layer of the second permanent magnet.

Abstract: A device with a magnetic sensor includes a substrate with a device layer. A magnetic sensor is formed on the device layer and includes a first permanent magnet. The first permanent magnet has at least one alternating ferromagnetic (FM) layer and antiferromagnetic (AFM) layer, with a barrier layer disposed between the FM layer and the AFM layer. The first permanent magnet is magnetized in a first direction at a temperature higher than a blocking temperature of the AFM layer. A plurality of device pads are coupled to the magnetic sensor. An integrated circuit substrate with a plurality of IC pads, wherein the plurality of device pads are selectively eutectic bonded to the plurality of IC pads at a bonding temperature greater than the blocking temperature of the AFM layer of the first permanent magnet.

Abstract: A test system includes a first, second, and third power converter and a data collection system. The test system performs load testing on the second and third power converters without requiring any external load. The first power converter is supplied by an Alternating Current (AC) source. During a test cycle, the first, second, and third power converters are controlled such that the second power converter is supplied by an output current of the first power converter and a feedback current output by the third power converter. The third power converter receives current output by the second power converter and outputs the feedback current onto the second power converter. The data collection system receives power converter test characteristics (voltage, current, and temperature information) during the test cycle without any power being dissipated by an external load. Test information is used to determine whether the second and third power converters are defective.

Abstract: A structure for measuring iron loss of a motor stator core is provided. The structure includes an auxiliary core whose both end surfaces in a longitudinal direction come in contact with inner end surfaces of two adjacent stator teeth among a plurality of stator teeth in a radial direction in order to measure iron loss of a stator core in which a plurality of slots and the plurality of stator teeth are alternately formed on an inner circumferential surface of a stator yoke in a circumferential direction. A pair of excitation windings is provided at portions of the auxiliary core in the longitudinal direction spaced-apart from each other. A B-coil that is a sensor coil is provided at the auxiliary core so as to be positioned inside any one excitation winding of the pair of excitation windings.

Abstract: A number of position sensors inductively sense a target's position relative to a number of sensor coils. The target is magnetically coupled with first and second coils so that signals are generated that depend on the relative position of the target and the first and second coils. Substantially all of the target overlaps with loops of the first coil and so that when a first end of the target is adjacent a first loop of the first coil, a second end of the target is adjacent a second loop of the first coil that has an opposite winding direction to that of the first loop. The second coil is arranged relative to the target such that the magnetic coupling between the second coil and the first end of the target is opposite to the magnetic coupling between the second coil and the second end of the target.

Abstract: The present invention relates to a test system for high-voltage technology devices, in particular shunt reactors, as defined in the preamble of independent patent claim 1. The invention also relates to a method which can be carried out with this test system and is intended to test high-voltage technology devices according to coordinate patent claim 5. The general idea of the test system according to the invention is to provide a continuously adjustable inductance and a capacitance, which can be adjusted in discrete steps, on the secondary side of the test transformer in such a manner that said components form a series resonant circuit together with the test object in the form of an inductance.

Abstract: Highly sensitive and tunable RF sensors that provide detection and analysis of single cells and particles are provided. The tunable RF sensors are configured as tunable interferometers, wherein cells or particles to be analyzed are passed through a channel, such as a microfluidic channel, across waveguides corresponding to reference and test branches of the interferometers. A network analyzer coupled to the interferometers can be configured to measure a plurality of scattering parameters, such as transmission scattering coefficients (S21) of the reference and test branches, to evaluate characteristics of cells passing through the channel. A plurality of tunable interferometers may be employed, each interferometer operating in different frequency bands such that information obtain from the plurality of interferometers may be combined to provide further information.

Abstract: A device for detecting position of a rotating working means in an active magnetic bearing which comprises sensors (A, B) of the position of a rotating working means, detectors (D) of an output signal of the sensors (A, B) and evaluation circuits connected to control system of the active magnetic bearing. The sensors (A, B) of the position are composed of high frequency transformers, each of which is directly connected to the detector (D) of its output signal and the detectors (D) are composed of an electrical quadrupole with a non-linear transfer characteristic.

Abstract: A high voltage sensor is located within a dielectric canister inside a high voltage power line support insulator. A space through the voltage sensor accommodates a mechanical connecting rod associated with a circuit interrupter switch located in another section of the support insulator. An electrically floating dumbbell-shaped sensor extending between and capacitively coupled to high voltage and low voltage shields assumes a midpoint voltage value between the shields. A sensor plate or other suitable pickup capacitively coupled to the dumbbell sensor provides a voltage measurement, which is calibrated to provide a measurement of the power line voltage. This solution allows a voltage sensor to be added to or integrated in conventionally sized power line support insulators with no additional size, negligible additional weight, and minimal additional cost.

Abstract: An embodiment of a measuring circuit for measuring the leakage current flowing in a portion of an electronic device when said portion is biased by a biasing unit of the electronic device is proposed. The measuring circuit includes a first section configured to generate a threshold current, a second section configured to receive the leakage current, a third section configured to compare the threshold current with the leakage current, and a fourth section configured to generate an output voltage based on the comparison between the threshold current and the leakage current. Said first section is configured to set the value of said threshold current to a different value at each reiteration of an operating cycle. Said fourth section is configured to measure said leakage current based on a detection of a change in the value of the output voltage between two reiterations of the operating cycle.

Abstract: An electromagnetic induction position detection sensor includes a plurality of loop coils, each being an N-turn loop coil formed by winding a conductor N times (N is an integer equal to or greater than 2), and each coil turn having long side portions that are separated by a predetermined width and that are parallel to each other. The loop coils are arranged at predetermined intervals in a predetermined direction intersecting the long side portions of the loop coils. The width of at least one of the N turns of the Mth loop coil from the edge portion of the sensor in the predetermined direction (M is an integer equal to or greater than 2) is larger than the predetermined width, with the long side portion of this turn of the Mth loop coil arranged more outward than the long side portions of the other turns of the Mth loop coil.

Abstract: A test system is provided for performing radio-frequency tests on an electronic device under test (DUT) having multiple antennas. The test system may include a test unit for generating radio-frequency test signals, a test enclosure, and a test antenna fixture. The test fixture may include tunable antenna circuitry, antenna tuning elements, a test sensor, a microcontroller, a battery, and a solar cell that charges the battery, each of which is mounted on a test fixture within the test enclosure. The test sensor may be used to detect stimuli issued by the DUT. In response to detecting the stimuli, the microcontroller may send control signals to the antenna tuning elements to configure the antenna circuitry in different modes. Each of the different modes may be optimized to test a selected one of the multiple antennas in the DUT when operating using different radio access technologies and at different frequencies.

Abstract: Methods and apparatus for measuring the cleanliness of molten metals. Direct current is passed between electrodes through molten metal advancing through a passage in an electrically resistive wall. A voltage signal is analyzed for the presence of solid generally non-metallic inclusions in the metal. Direct current is supplied by one or more ultra-capacitors and the decay in discharge voltage of the capacitor(s) is compensated for by passing the current from each capacitor through a resistor ladder network circuit having resistors connected in parallel. Individual resistors are switched on or off in a sequence effective to change the resistance of the circuit and maintain the current within a predetermined range. Heat generation and noise pick-up are minimized by maintaining a low discharge voltage and measurement current while using FETs only in the fully ON or OFF conditions to switch the resistors into or out of the circuits.

Abstract: An apparatus includes a top plate and an extension card surrounding a space for a small electronic assembly. The extension card and small electronic assembly are mounted to the top plate. The apparatus includes a plurality of test probes extending through the top plate and moving relative to the top plate. A portion of the test probes are positioned to contact the extension card and a portion are positioned to contact the small electronic assembly when the test probes move with respect to the top plate. The apparatus includes a vacuum box in contact with the top plate and surrounding the extension card and small electronic assembly. The top plate moves relative to the test probes so the test probes contact the extension card and the small electronic assembly in response to a vacuum force evacuating an area under the top plate and within the vacuum box.