A tablet stand is disclosed which incorporates a near field antenna configuration which couples to a near field antenna in the back of a tablet and provides a near field antenna coupling region for near field communication at the front of the tablet. The stand may be completely passive and use conductive antenna elements and passive resonance matching circuit elements to provide efficient coupling. In another aspect a thin profile passive keyboard adapted for use with a near field enabled tablet is provided. In another aspect a mounting bracket or holder, embedded antenna, and passive keyboard combination is provided adapted for converting a tablet into a notebook type configuration.

A medical device includes: an implantable unit configured to be at least partly implanted in the body of a user; a transformer core configured to be arranged at least partly under the skin of the user; and an internal cabling configured to connect the implantable unit to the transformer core. The internal cabling includes a first winding around the transformer core; and an external unit configured to be at least partly arranged outside the body of the user, the external unit including: a power supply circuity and a connector coupled to the power supply circuity configured to supply power from the power supply circuity to the implantable unit via the transformer core. The connector includes a first connector part and a second connector part.

A technique facilitates use of an inductive coupler assembly with casing, e.g. well casing. An inductive coupler is formed as a female inductive coupler with an inductive coil. The inductive coupler is constructed for sliding movement along an exterior of the casing so that it may ultimately be positioned and secured at a suitable location along the casing. The inductive coupler is designed for connection with an electrical device, e.g. a sensor. The inductive coupler facilitates the transfer of sensor data and/or power signals across the casing. Signal transfer across the casing is further enabled by a male inductive coupler positioned within the casing at a location which allows it to cooperate with the exterior, female inductive coupler.

An inductive power outlet for wirelessly powering a power receiver is presented that comprises a voltage peak detector that is configured to detect voltage changes that are indicative of increase in a system resonant frequency. The inductive power outlet is configured to respond to detected voltage changes by shutting down or issuing a warning, and the voltage peak detector is further used to detect communication signals initiated by the power receiver to the power outlet.

An apparatus for determining a relative position of a wireless power transmitter from a wireless power receiver is provided. The apparatus comprises a plurality of sense coils, each configured to generate a respective signal under influence of an alternating magnetic field comprising a plurality of wave pulses, each wave pulse occurring in a respective time slot of a plurality of time slots. The apparatus further comprises a processor configured to determine the relative position of the wireless power transmitter from the wireless power receiver based on the respective signal from each of the plurality of sense coils.

A wireless power and data transmission apparatus includes an inner module and an outer module. The inner module includes: an annular-shaped first antenna disposed around an axis; and an annular-shaped first communication electrode disposed around the axis, the first communication electrode being at a different position from that of the first antenna regarding a direction along the axis. The outer module includes: an annular-shaped second antenna disposed around the axis, the second antenna performing power transmission or power reception with the first antenna via magnetic field coupling or electric field coupling; and an annular-shaped second communication electrode disposed around the axis, the second communication electrode being at a different position from that of the second antenna regarding the direction along the axis, and the second antenna performing communications with the first communication electrode via electric field coupling.

A radio transmitter includes a power amplifier configured to receive an input voltage signal and output an output voltage signal; a transformer configured to receive the output voltage signal and output a load voltage signal to a load; a sensing inductor configured to output a sensed current signal in accordance with a magnetic coupling with the transformer; a digitally controlled phase shifter configured to receive the output voltage signal and output a phase-shifted voltage signal in accordance with a phase control code; a mixer configured to output a mixed current signal in accordance with a mixing of the sensed current signal and the phase-shifted voltage signal; and a transimpedance amplifier with of a low-pass response configured to convert the mixed current signal into a mean voltage signal.

A magnetically conductive electrically insulating (MCEI) trough for an inductive coupler in a drill pipe, drill string, and other downhole tools. The MCEI trough may be a ring or two or more ring segments. The trough may comprise interior side and bottom walls forming an open channel. The interior walls may comprise one or more axial flutes. An exterior wall may be spaced apart from the interior walls. The spaced apart interior and exterior walls may form a top surface. The exterior wall may comprise one or more flutes. The flutes may protrude from the respective wall surfaces, or the flutes may protrude into the wall surfaces. A wire coil may be laid within the open channel. The wire coil may comprise axial corrugations. The axial corrugations may couple with the axial flutes of the interior side walls. The wire coil may comprise wire strands laid within the trough.

A semiconductor device package having galvanic isolation is provided. The semiconductor device package includes a package substrate having a first inductive coil. A first semiconductor die is attached to a first major surface of the package substrate. The first semiconductor die includes a second inductive coil substantially aligned with the first inductive coil. A second semiconductor die is attached to the first major surface of the package substrate. A wireless communication link between the first semiconductor die and the second semiconductor die is formed by way of the first and second inductive coils.

A semiconductor device package having galvanic isolation is provided. The semiconductor device package includes a package substrate having a first inductive coil. A first semiconductor die is attached to a first major surface of the package substrate. The first semiconductor die includes a second inductive coil substantially aligned with the first inductive coil. A second semiconductor die is attached to the first major surface of the package substrate. A wireless communication link between the first semiconductor die and the second semiconductor die is formed by way of the first and second inductive coils.