Method and Apparatuses for of transmitting data between semiconductor chips are described. An example apparatus includes a first semiconductor chip and a second semiconductor chip. The first semiconductor chip includes first and second inductors. The first semiconductor chip transmits a first combination of a plurality of data bits in logical value by flowing a first current through the first inductor and by flowing substantially no current through the second inductor. The second semiconductor chip includes third and fourth inductors that correspond respectively to the first and second inductors of the first semiconductor chip. The second semiconductor chip receives the first combination of the plurality of data bits in logical value by detecting an electromotive force at the third inductor responsive to the first current and by detecting substantially no electromotive force at the fourth inductor responsive to no current.

Methods and apparatus for providing data transfer with a drive coil to transmit information, a receive coil magnetically coupled to the drive coil, and a first magnetoresistive sensor proximate the receive coil to detect information from the receive coil. In embodiments, the drive and receive coils are separated by an isolation material. In embodiments, a signal isolator IC packages includes transmit and receive coils and a magnetic field sensing element coupled to the receive coil.

A power receiving apparatus includes a power receiving unit configured to wirelessly receive power from a power transmission apparatus, a communication unit configured to perform communication based on a standard of Near Field Communication (NFC), a detection unit configured to detect the power transmission apparatus, and a control unit configured to control the communication unit not to perform the communication based on the standard of NFC based on detection of the power transmission apparatus by the detection unit, wherein the power receiving unit receives power after the control unit controls the communication unit not to perform communication based on the standard of NFC.

The present disclosure relates to a circuitry and a method for detecting a temperature of a wireless charging coil, and a storage medium. The circuitry includes: a target resistor, a voltage supply circuit, a voltage detection circuit, and a processing component. The voltage supply circuit is configured to apply a target voltage to the series circuit. The voltage detection circuit is configured to obtain a first measured voltage across two ends of the wireless charging coil and a second measured voltage across two ends of the target resistor. The processing component is configured to: determine a working current of the series circuit based on the second measured voltage and a resistance of the target resistor; determine a real-time resistance of the wireless charging coil based on the first measured voltage and the working current; determine a real-time temperature of the wireless charging coil based on the real-time resistance.

A controller comprising a driver interface referenced to a first reference potential, a drive circuit referenced to a second reference potential, and an inductive coupling. The driver interface comprises a first receiver configured to compare a portion of signals having a first polarity on the first terminal of the inductive coupling with a first threshold, and a second receiver configured to compare a portion of signals having a second polarity on the second terminal of the inductive coupling with a third threshold. The drive circuit comprises a first transmitter configured to drive current in a first direction in the second winding to transmit first signals, and a second transmitter configured to drive current in a second direction in the second winding to transmit second signals, the second direction opposite the first direction.

In described examples, a first die includes a primary LC tank oscillator having a natural frequency of oscillation to induce a forced oscillation in a secondary LC tank oscillator of a separate second die via a magnetic coupling between the primary LC tank oscillator and the secondary LC tank oscillator.

An illustrative example embodiment of a wireless power transfer device includes an inductor panel and a capacitor panel adjacent the inductor panel. The capacitor panel includes a first conductive plate adjacent one side of the inductor panel, a dielectric layer adjacent the first conductive plate, and a second conductive plate adjacent the dielectric layer on an opposite side of the dielectric layer from the first conductive plate.

An inductive communication unit is for use in two-way communication. The unit has a transmitter coil configured to generate a first alternating magnetic field representing first information to be transmitted, and a receiver coil configured to receive a second magnetic field representing second information to be received. The transmitter coil and the receiver coil are arranged extending in parallel in vicinity to each other and positioned overlapping each other in part to an extent that, upon exposure of the first alternating magnetic field to the receiver coil, an overlapping portion of the receiver coil induces a first current and a nonoverlapping portion of the receiver coil induces a second current, and where the first and the second currents are of same magnitude and opposite polarity.

Methods and apparatus for bi-directional communication between first and second die of a signal isolator for feedback and/or diagnostic signals. In embodiments, the first and second die can be matched.

A portable device is provided. The portable device includes a power receiving unit configured to receive a first energy or a second energy from a wireless power transmitter, the first energy being used to perform a communication function and a control function, the second energy being used to charge a battery, and the wireless power transmitter being configured to wirelessly transmit a power, a voltage generator configured to generate a wake-up voltage from the first energy, or to generate a voltage for charging the battery from the second energy, a controller configured to perform the communication function and the control function, the controller being activated by the wake-up voltage, and a communication unit configured to perform a communication with the wireless power transmitter based on a control of the controller.