[Premium-Rx] Clean LOs

[Oleg Skydan]

Hi, All !
   I believe that the main problem with the RA6830 synthesizer is that it does not use enough bits for the D to A in the fractional N loop coupled with very poor ground loops in the 60 Hz supply. 

   

The modern all digital fractional-N technique DOES NOT use D/A at all. 
See the patent US 4,609,881.

I tried this tecnology (for the LO in my transceiver) and was very satisfied 
with a very simple design (here is my article from the QEX):
http://users.ints.net/skidan/T03DSP/Download/F-N_Synth.tif

All the best !
Oleg UR3IQO
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