Square wave VFO....

Hi all

I am fiddling with some direct conversion receivers. My question is this: I want a try using a Tayloe detector. For this I obviously need a vfo. Most of the designs I have seen use a DDS to achive high resolution tuning, but I was wondering if it wasnt possible to do it with some sort of fractional programmable divider or something, in an fpga maybe, since the Tayloe detector is nothing more than a analog mux driven by a square wave clock?

I hope this post make sense? - My digital electronics skills have taken a dive so I am hoping someone could put me on the right road

You are right, generate square wave clock any way you want.

Remenber that only question is clock must be 4x input frec.

Thanks hwswboy

One more question though, OK so now I want to make a variable clock oscillator, so I guess one would either use a vcxo with some sort of PLL (I guess not a conventional one?) or run a high frequency clock and divide it down?

I have always just used a crystal on a specific frequency :)

What is the best method to get a high resolution variable clock?