A method for use in a sensor includes generating a first signal by a first sensing module in response to a magnetic field associated with a rotating target, generating a base word based on the first signal, the base word including a first base bit that is generated by comparing respective components of the first signal, reversing a respective polarity of the first signal and offsetting the first signal, generating a test word based on the first signal, the test word being generated after the respective polarity of the first signal is reversed and the first signal is offset, the test word including a first test bit that is generated by comparing the respective components of the first signal, and setting a value of an error signal based on whether the test word matches the base word.

Sensor devices and corresponding methods are provided. When a signal path output (COMP OUT) indicates no threshold crossings, diagnosis is performed with a timing based on a clock. In case threshold crossings are indicated, diagnosis is performed with a timing based on threshold crossings.

A magnetic field analysis device includes a magnetization application unit that divides a virtual space into a plurality of volume elements and applies magnetization to each of the volume elements, and a magnetic field calculation unit that calculates, on each of a plurality of observation points in the virtual space, based on the magnetization applied to a plurality of the volume elements around the observation point, a magnetic field generated at the observation point for each volume element and obtains a magnetic field generated at each of the plurality of the observation points based on a calculation result of each of the plurality of the volume elements.

A magnetic sensor includes first to fourth resistors, a power supply port, a ground port, a first output port, and a second output port. The first resistor and the second resistor are located in a first region and connected in series via a first connection point connected to the first output port. The third resistor and the fourth resistor are located in a second region and connected in series via a second connection point connected to the second output port, at least a part of the second region being located at a position different from the first region in a direction parallel to an X direction. The first and second resistors are located between the third and fourth resistors in a direction parallel to a Y direction.

A readout integrated circuit (IC) architecture for a tunnelling magnetoresistive (TMR) sensor which uses common mode feedback to achieve a performance level suitable for accurate detection of biomagnetic signals. The architecture uses a three-operational amplifier configuration with chopper stabilization. The architecture may form part of a fully integrated biomagnetic sensor electronics package that includes an array of TMR sensors together with modules for signal amplification and conditioning, data conversion and communication.

A magnetic sensor capable of reducing noise caused by an interference magnetic field and capable of outputting a highly accurate signal in accordance with changes in a detected magnetic field includes a magnetic detection element, a first magnetic body having a first surface and a second surface, which is opposite to the first surface, and a second magnetic body positioned approximately in the center of the first magnetic body in the short direction on the first surface of the first magnetic body. The magnetic detection element is provided to be opposite to the second magnetic body with the first magnetic body interposed in between and positioned approximately in the center of the first magnetic body in the short direction. The magnetic sensing direction of the magnetic detection element is a direction approximately parallel to the short direction of the first magnetic body and the second magnetic body, and a width W1 of the first magnetic body is larger than a width W2 of the second magnetic body.

A magnetic field generator includes: an upper layer coil composed of a first conductive material and forming a loop circuit having a coil portion; a lower layer coil composed of a second conductive material and forming a loop circuit having a coil portion arranged opposite to the coil portion of the upper layer coil at a predetermined distance; and a substrate supporting the upper layer coil and the lower layer coil and having a dielectric material between the upper layer coil and the lower layer coil. High-frequency currents of opposite phases are passed through the upper layer coil and the lower layer coil, respectively, and a length per loop of the coil portion in the upper layer coil and the coil portion in the lower layer coil is matched to one wavelength of the high-frequency current.

Described is a security sensor comprising two or more sub-sensors for use in a variety of installations where different magnetic fields may be experienced by the security sensor as a result of the variety of installations. One of the sub-sensors may have a low magnetic sensitivity while the other sub-sensor may have a much higher sensitivity to magnetic fields. In operation, one or both sub-sensors are used to determine if a door or a window has been opened.

The magnetic detection system 100 is provided with a magnetic sensor 1, a storage unit 5, a first determination unit 42 for outputting whether or not the magnetic body 90 has passed as a first determination result 20, a second determination unit 43 for outputting whether or not the magnetic body has passed as a second determination result 21, a display unit 6 for displaying (notifying) the first determination result and the second determination result. The second determination unit is configured to have higher determination accuracy than the first determination unit.

A magnetic body inspection method and magnetic body inspection apparatus (1) that has a magnet (10) and a magnetic sensor (20) that outputs electric signals. At least two electric signals are obtained by the magnetic sensor (20). A magnetic body present inside a nonmagnetic body can be detected non-destructively, by outputting the difference between the two obtained electric signals.