Wirelessly charged electronic device with shared inductor circuitry

摘要

An electronic device may contain an input-output device such as a speaker, vibrator, or near field communications antenna. The input-output device may include an inductor. The inductor in the input-output device may be shared by wireless charging circuitry in the electronic device so that wireless charging signals can be converted into power to charge a battery in the electronic device. A separate inductor may also be provided within an input-output device to support wireless charging. A drive circuit may supply drive signals to the input-output device such as audio signals, vibrator control signals, or near field communications output signals for external near field communications equipment. An input amplifier that is coupled across the inductor in the input-output device may be used in receiving near field communications signals.

主权项

1. An electronic device configured to be powered using a battery, comprising:
storage and processing circuitry; an input-output device coupled to the storage and processing circuitry, wherein the input-output device comprises a speaker having an inductor, a diaphragm coupled to the inductor, and travel-limiting stop structures; wireless charging circuitry configured to receive wireless charging signals using the inductor and configured to charge the battery; and a drive circuit that drives audio signals across the inductor to operate the speaker in a speaker mode and that drives vibrator control signals across the inductor to operate the speaker in a vibrator mode in which the inductor strikes the travel-limiting stop structures.