WIRELESS SPEAKER UNIT

摘要

A wireless speaker unit includes a radio transceiver oscillator which provides timing signals to a pulse width modulator and to a sample rate controller that provides a variable oversampling signal to a delta sigma modulator. The variable oversampling signal determined by a sampling rate of the digital audio signal.

主权项

1. A wireless speaker unit for an audio system comprising:
(a) a transceiver arranged to receive a transmitted radio frequency signal and to separate from said transmitted radio frequency signal plural audio data samples each audio data sample preceding another audio data sample at a first audio data sampling rate, said transceiver including a transceiver oscillator arranged to output an alternating transceiver oscillator signal; (b) a pulse width modulator arranged to convert said plural data samples to a succession of pulses proceeding at a pulse rate adjusted for said first audio data sampling rate; and (c) a speaker operable by said pulses of increased magnitude to emit sound.