Hi, --- On Thu, 4/2/09, John Gilmore <[email protected]> wrote:
> There's another chance to get kids into radio... > > If a high volume kids' laptop had stereo "HD audio" ports available > (24-bit 192 kHz converters, 95 db input and 100 db output), how cheap > and small a circuit could you build onto that motherboard to provide > useful LW/AM radio reception? > > John Here is my 2 cents: 1) AM signals known to be strong, RF Gain may not be required. 2) Undersampling can be used to downconvert/digitize AM signals. 3) RF Tunning is the problem. We have to think for away to use the voltage from one of the audio output ports to control a bandpass filter center frequency (voltage controlled filter). 4) Software demodulation. Best Regards, Firas _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
