Texas Instruments Corporation

Rajaram Subramonian

Gianpaolo Lisi

Gerard G Socci

Swaminathan Sankaran

Bradley Allen Kramer

Ali Djabbari

Nachiket Venkappayya Desai

Kosha Mahmodieh

Dingkun Du

Sakshi Arora

In described examples, an inductive structure includes first and second inductive coils to conduct respective first and second common mode currents induced by a common mode transient between: a first ground coupled to a connection between the first and second inductive coils; and a galvanically isolated second ground.

Inductive structures with improved common mode transient immunity

In described examples, an inductive structure includes a power coil and a data coil. The data coil is substantially centered within the power coil. A first portion of the data coil is for conducting current in a first direction. A second portion of the data coil is for conducting current in a second direction opposite the first direction. The first portion of the data coil is connected at a ground node to the second portion of the data coil. The power coil is for: receiving power without data; and outputting the received power without data.

Inductive structures with reduced emissions and interference

A first inductive structure includes a data coil to transfer data by inductive coupling with a second inductive structure. First and second portions of the data coil are connected to one another at a center tap to conduct respective first and second common mode currents, induced by a common mode transient between: a first ground line coupled to the center tap; and a galvanically isolated second ground line of the second inductive structure.

A wireless power transfer system includes a wireless power receiver having a rectifier. The rectifier includes switches. The wireless power receiver is operable to control the switches for ensuring a complex impedance at the input of the rectifier.

Adaptive rectifier and method of operation

A resonant power transfer system includes resonant circuitry () including an inductor coil () and a resonant capacitor () coupled to a first terminal () of the inductor coil, wherein the inductor coil and the resonant capacitor resonate to produce an excitation signal (I) and a state variable signal (V). Sub-sampling circuitry () samples first and second points of the state variable signal at a rate which is substantially less than the RF frequency of the state variable signal. Information recovery circuitry () produces a state variable parameter signal representing a parameter (A) of the state variable signal from information in the first and second sampled points. Control circuitry () produces a first control signal in response to the state variable parameter signal. Detection and optimization circuitry () produces a second control signal in response to the state variable parameter signal. Voltage regulation circuitry () produces a regulated supply voltage in response to the first control signal. Switching inverter circuitry produces the excitation signal in response to the regulated supply voltage and the second control signal.

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Cupertino, CA, United States of America

Rajaram Subramonian