RDS/RBDS FM receiver (external) for traffic conditions
Doug Sutherland
doug at proficio.ca
Sun Nov 18 21:20:54 CET 2007
Josh wrote:
> One of the apparent weaknesses of the Si USB dongles (from my armchair
> research) is the antenna connection - it might be nice to have a mini
> SMA or something (with the standard FM resistance -- 75 Ohms?)
Yeah the USB FM Radio stick has a wire sticking out, that is the antenna.
For most real applications of this chip, the earphone wire acts as the
antenna, like in my sony ericsson phone. The evaluation board for the
chipset has SMA connector so you can try different antennae.
Looky ....
http://www.electrosnab.ru/silabs/pdf/Si/si4700-B15rev1_0.pdf
http://www.electrosnab.ru/silabs/pdf/Si/AN230Rev0_3.pdf
http://www.electrosnab.ru/silabs/pdf/Si/AN232Rev0_2.pdf
http://www.electrosnab.ru/silabs/pdf/Si/AN234Rev0_2.pdf
http://www.electrosnab.ru/silabs/pdf/Si/AN235Rev0_5.pdf
http://www.electrosnab.ru/silabs/pdf/Si/AN284Rev0_1.pdf
-- Doug
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