Electronic device accessory

Details Electronic device accessory Electronic device accessory

2011-01-11

2011-01-11

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Circuitry combined with specific type microphone or loudspeaker

With electrostatic microphone

C381S111000, C367S137000

Reexamination Certificate

active

07869608

ABSTRACT:
Electronic devices and accessories such as headsets for electronic devices are provided. A microphone may be included in an accessory to capture sound for an associated electronic device. Buttons and other user interfaces may be included in the accessories. An accessory may have an audio plug that connects to a mating audio jack in an electronic device, thereby establishing a wired communications link between the accessory and the electronic device. The electronic device may include power supply circuitry for applying bias voltages to the accessory. The bias voltages may bias a microphone and may adjust settings in the accessory such as settings related to operating modes. User input information may be conveyed between the accessory and the electronic device using ultrasonic tone transmission. The electronic device may also gather input from the accessory using a voltage detector coupled to lines in the communications path.

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