Hi,
You may wish to consider a dual 4-input analog mux such as
the '4052. For instance, see
http://www.semiconductors.philips.com/pip/74HC4052.html
You can connect the quadrature LO outputs directly
to the S1 and S0 inputs. Then, because there are two
muxes, you can create a differential output without
needing to phase-split the incoming audio.
For example, assuming address sequence is 0-1-3-2-0-1-3-2
(S1 lags S0) connect:
1Y0=Left ch.
1Y1=Right ch.
1Y2=GND
1Y3=GND
2Y0=GND
2Y1=GND
2Y2=Right ch.
2Y3=Left ch.
Then, the voltage between 1Z and 2Z is the SSB output.
Perhaps, you can use a transformer-coupled output.
Put a cap across the primary to resonate at the
approximate output frequency, and connect it from 1Z to 2Z
through a suitable resistor. No op-amps or precise
resistors needed, and it provides the first stage of
filtering.
Disclaimer: I have not tried this, and there may be
a stupid reason why it won't work. Please don't
laugh too hard.
73,
Stewart KK7KA
|
