[hpsdr] Driving Altera FPGAs with a VCTCXO

[Charles Brain]

Hello All,

I am sorry for this simple question but I am hoping someone will be able
to prevent me making an expensive mistake.

I am trying to drive an Altera FPGA from an ABRACON VCTCXO
which has a 0.8v clipped sinewave output. I have done a search of the 
internet and the only technique I can find is to use a 74HCT04 inverter 
with a 1M feedback resistor. Is there a better way of doing this?

I am pretty much stuck with this 20 MHz VCTCXO as it is about the only one I can 
find in the Digi-Key catalogue. The company I used to use don't sell to the 
public anymore.
 
- Charles G4GUO