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RF/Microwave  

Wireless microphone with USB interface

Posted: 10 Aug 2011     Print Version  Bookmark and Share

Keywords:microphone  PCBA  USB dongle  transceivers 

Here's a document intended to show how the CC111x and CC251x series of low-power SoC (System-on-Chip) RF transceivers can be used to provide audio to USB interface. Two printed circuit board assemblies (PCBAs) are used for this purpose; a microphone PCBA based on the CC1110 and TLV320AIC3104 Low Power Stereo Audio Codec, and a standard CC1111 'USB dongle'. The CC1111 is similar to the CC1110, with the addition of a full-speed USB 2.0 compatible interface. Audio is sampled at a 16kHz sample rate, and 16 bit resolution is maintained.

While the design described is based on the C1110 and CC1111 transceivers and operates in the 900 to 928MHz ISM bands, it is easily modified to work with the CC2510 and CC2511 transceivers, which operate in the 2.4GHz ISM band.

View the PDF document for more information.





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