Shure Acquisition Holdings, Inc.

Yang Tang

Michael Joseph Goodson

Robert Mamola

Thomas J Kundmann

Robert Szopko

Jeffrey Arthur Meunier

A flexible multi-channel diversity wireless audio receiver system for routing, processing, and combining multiple radio frequency (RF) signals containing audio signals received on respective antennas is provided. The wireless audio receiver system provides flexible routing of multiple RF signals in different selectable modes, and low latency uninterrupted reception of signals in harsh RF environments by combining multiple RF signals to maximize signal-to-noise ratio. The audio output may be generated in an uninterrupted fashion and mitigate multipath fading, interference, and asymmetrical noise issues. Received RF signals may also be cascaded by the wireless audio receiver system to allow daisy chaining.

Flexible multi-channel wireless audio receiver system

Embodiments include a hybrid frequency synthesizer comprising a direct digital synthesizer configured to generate a digital output signal having a frequency determined by an input signal received from an externally-generated signal source. The hybrid frequency synthesizer further includes a delta sigma modulator configured to generate a delta-sigma modulated signal based on the digital output signal, the delta sigma modulator being coupled to the direct digital synthesizer. The hybrid frequency synthesizer also includes a digital-to-analog converter configured to convert the delta-sigma modulated signal into an analog output signal, the digital-to-analog converter being coupled to the delta-sigma modulator. Moreover, the hybrid frequency synthesizer includes a bandpass filter configured to remove interference frequencies from the analog output signal, the bandpass filter being coupled to the digital-to-analog converter; and a phase locked loop coupled to the band pass filter and driven by a reference signal received therefrom.

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Wilmette, IL, United States of America

Yang Tang