[hpsdr] High Performance DDS Oscillator source

[Chris Bartram]

There's a tutorial on high performance VHF crystal oscillator design on my 
little amateur radio web site. <www.blaenffos.org/gw4dguindex.htm> (or is 
it .html?) That gives most of the information required to design a very low 
phase noise Driscoll crystal oscillator operating in the 100MHz region. 

The 'traditional' Butler circuit beloved of many amateur microwavers can be 
improved-on...

To get to 1GHz use balanced diode doublers (which have less additive phase 
noise than non-linear transistor multipliers).

Unfortunately, I don't have a lot of time to devote to hobby radio at the 
moment, so, much as I'd like to, I can't offer to do a design. As people 
involved in the microwave SDR project will know, it's currently taking me 
months to fit-in work which should take days! 

If anyone is seriously interested in producing a design, I'd be willing to 
help, but please remember my time limitations.

Vy 73

Chris
GW4DGU

 1187430807.0