[Premium-Rx] Digital I & Q

[Tisha Hayes]

You could probably do it with a fast DAC, some buffering/ switching logic
and some op-amps. Then you could take the serial I & Q stream, run it
through a UART and feed the DAC to do a conversion.

It would be pretty fast, first the "I" word goes into the UART, comes out as
parallel data, and is buffered into the DAC. The output goes to the "I"
analog.

Meanwhile the "Q" word is coming into the UART and then bouncing over to the
buffer (maybe a second buffer) and then into the DAC. That would be your "O"
analog value.

Run it fast enough, both from the digital processing/ UART/ buffering and
the analog processing (where the DAC toggles between different analog
circuits) and you could end up with two separate analog channels of I and Q
information.

Or, just feed it into a PIC to dissect the serial streams, buffer the
streams and run them into separate DAC's.

Couple of design choices there. Good thing that DAC's can run nice and fast
these days. You definitely want to oversample at several times the maximum
frequency of the I & Q outputs.

-- 
Ms. Tisha Hayes/ AA4HA
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