Apple Inc.

Amazon Technologies, Inc.

Ruenjou Lu

Bharat K Patel

Paul J Costa

Neal V Cecil

Timur O Starobinets

Dane Oleson

Fei Ni

Mahmoud R Amini

Nadim Awad

Cesar Lozano Villarreal

Jonathan M Zweig

David C Breece, Iii

Allen Lee

Circuits, methods, and apparatus that may provide power supply voltages in a safe and reliable manner that meets safety and regulatory concerns and does not exceed physical limitations of cables and other circuits and components used to provide the power supply voltages. One example may provide a cable having a sufficient number of conductors to provide power without exceeding a maximum current density for the conductors. Another example may provide a cable having more than the sufficient number of conductors in order to provide an amount of redundancy. Current sense circuits may be included for one or more conductors. When an excess current is sensed, a power source in the power supply may be shut down, the power source may be disconnected from one or more conductors, or both events may occur.

Power supply with current limit on individual conductors

Methods, systems, and apparatus for selectively communicating data and audio over a limited-size audio plug. A host device determines whether an audio accessory or a data communicating accessory is plugged therein via a signal, or lack thereof, communicated to the host device via the audio plug of the accessory. The host device then either communicates audio or data over the audio plug contacts that are typically used only for audio communication based on whether its connected to an audio accessory or data communicating accessory. An audio plug may also include a split-ring contact where multiple, independent contacts are formed in place of a single tip, ring, or sleeve contact. The split-ring contact may be used for communicating audio and/or data.

Data communications via limited length audio jack

A user device may include a transmission power manager to control a transmission power level of a wireless transceiver based on a location of a human body proximate the user device as detected by a proximity sensor. In response to at least one of a power up of the user device or initialization of a wireless transceiver, the transmission power manager may restrict a transmission power level of the wireless transceiver to one of a plurality of power states. The transmission power manager may then operate to detect a step in proximity sensor data obtained by the proximity sensor. Then, in response to detecting the step in the proximity data, the transmission power manager may restricting the transmission power level of the wireless transceiver and determine a proximity threshold value based at least in part on the detected step and the proximity sensor data.

Managing a transmission power level

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Fremont, CA, United States of America

Ruenjou Lu