Electrical audio signal processing systems and devices – Headphone circuits
Reexamination Certificate
2005-07-28
2011-10-04
Faulk, Devona (Department: 2614)
Electrical audio signal processing systems and devices
Headphone circuits
C381S072000, C381S071600, C381S370000, C381S311000, C455S569100
Reexamination Certificate
active
08031878
ABSTRACT:
Power is delivered from a power source in a head-mounted device to a separate accessory that is coupled to the head-mounted device. Power and signals are delivered on a common conductor that couples the head-mounted device to an accessory. One or both of the head-mounted device and the accessory are configured based on the signals. Power may be received at an accessory from the head-mounted device through a dedicated power conductor. Power may be delivered from a power source in a portable accessory to a head-mounted device that is coupled to the portable accessory and uses the power for circuitry in the head-mounted device that delivers audio to a user.
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Faulk Devona
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