Exemplary embodiments are directed to a device include a parasitic coil for protection of the device. A device may include a first circuit configured to receive a first transmitted signal at an operational frequency. The device may also include a second circuit a second circuit configured to generate a field that opposes at least one of an undesirable portion of a wireless power field of the first transmitted signal and a portion of another wireless power field proximate the first circuit, the another wireless power field generated by a second transmitted signal at a non-operational frequency of the first circuit.

A method of performing active shielding of an electronic device from a magnetic field having a first flux, using a circuit; having the steps of: measuring, using a Hall effect sensor, a first magnitude and a first direction of the first flux; creating an output voltage equal to the first magnitude; feeding the output voltage to a differential amplifier; amplifying the output voltage to create an amplified output; comparing, using an error amplifier, the amplified output to a reference voltage to determine an error voltage; feeding the error voltage to an electric power switching circuit; generating a switching waveform based on the error voltage; feeding the switching waveform as an input to a driver module; creating, based on the input, a current having amplitude equaling the first magnitude and a second direction opposite of the first direction, such that a second flux is created to cancel the first flux.

An active electromagnetic interference (EMI) filter includes a first amplifier and a second amplifier. The first amplifier is configured to sense noise signals on a power conductor. The second amplifier is coupled to the first amplifier and is configured to drive a cancellation signal onto the power conductor. The cancellation signal is to reduce the amplitude of the noise signals sensed by the first amplifier. An output impedance of the second amplifier is lower than an output impedance of the first amplifier.

A computer-implemented method of reducing an impact of stray magnetic fields on components of a quantum computing chip is disclosed. The computer implemented method includes applying a first current signal to a first component of a quantum computing chip, whereby the first component generates a stray magnetic field impacting an operation of a second component of the quantum computing chip. The computer implemented method further includes applying a compensation current signal to a shielding circuit of the quantum computing chip, the compensation current signal generated according to a predetermined function of the first signal, to magnetically shield the second component from the stray magnetic field generated by the first component.

A configurable cage of Faraday has a cavity enveloped by a layer of conductive material whose resistance can be modified by an external stimulus. The conductive material may be inside or outside a substrate or may be without a substrate. The layer may be continuous, or applied in a pattern, such as a mesh. The conductive material can be a perovskite or a phase-change memory material, and the external stimulus can be electrical. Various electrical pulses can be used to configure the resistance/conductivity of the material, and therefore the level of shielding from magnetic waves that the Faraday cage provides.

According to various implementations, a sensor mat includes a mat substrate, a sensor electrode, and a shield electrode. At least a portion of the sensor and shield electrodes are spaced apart from and parallel to each other on a first surface of the mat substrate. The shield electrode is electrically coupled to a voltage source to create a capacitance between the shield electrode and the sensor electrode, and the sensor electrode is used to detect a change in the capacitance. The shield electrode may also be alternately used for heating the surface of the vehicle part adjacent the mat. For example, the sensor may be disposed adjacent a portion of a steering wheel or a seat assembly and is used for sensing presence of an occupant's hands or body adjacent the steering wheel or seat assembly.

A vehicle electronic module is provided. The vehicle electronic module has a reduced size and improved productivity by replacing a sensor and an offset unit of an electromagnetic interference (EMI) filter module with a printed circuit board (PCB) winding structure. The electronic module includes a sensor that detects EMI noise of a power line and an offset unit that transmits an offset voltage for removing the EMI noise to the power line. A controller is configured to generate the offset voltage that corresponds to the EMI noise detected by the sensor. Then sensor and the offset unit are formed in a stacked structure of the PCB.

An active magnetic shield system, including an array of magnetic field sensors arranged to sense a local magnetic field. An array of magnetic field elements are arranged produce a magnetic field. Each magnetic field element has a unit coil for mounting to a plurality of surfaces arranged in at least 3 planes to define an enclosed cancellation volume, and to produce a vector magnetic field pattern.

A filter assembly is disclosed that includes a monolithic filter having a surface and a heat sink coupled to the surface of the monolithic filter. The heat sink includes a layer of thermally conductive material that can have a thickness greater than about 0.02 mm. The heat sink may provide electrical shielding for the monolithic filter. In some embodiments, the filter assembly may include an organic dielectric material, such as liquid crystalline polymer or polyphenyl ether. In some embodiments, the filter assembly may include an additional monolithic filter.

Systems and methods of shielding a hand sensor system in a steering wheel are disclosed herein. An exemplary hand sensor system includes a sensor mat and a heater mat that is disposed between the sensor mat and a frame of the steering wheel. A power source selectively provides a heating current to the heater mat to provide heat to the steering wheel and a shielding voltage signal to the heater mat to provide electrical shielding for the sensor mat when heating is not needed or when sensing takes priority over heating. Alternatively, the system may include a shield mat that is separate from the heater mat and is disposed between the sensor mat and the heater mat. In addition, to isolate the signal carried by individual sensor return wires, a metallic or insulating covering or conduit may be provided around the wires or portions thereof.