JJ wrote:
"Leon" wrote in news:1142720911.911739.64900@

Bus switches like the FST3125 make very good mixers and quadrature
sampling detectors, as in the SoftRock SDRs.

Leon



And how about the IF amp? And VFO?
DDS like AD9850 look interesting.

ADI makes some very nice VCAs, like the AD603. They are probably the
best IF devices available, now. Racal was using FETs for IF amplifiers
in their military radios when I worked for them a few years ago.

PLLs are better than DDSs, but it can be diificult to make a good one.
A DDS may be used to provide a reference for a PLL, of course, for fine
tuning.

Leon