Ok, I just tried it out, and it works fine at 20Mhz (given my transistor, hehe sbc35)
You can just use one transistor and one resistor (like you said). I don't know what you mean by common base configuration, but using a common source is what I did.
(1v->5v supply)|
|
R
|---------translated output(1v->5v)
3.3v output-----N
|
|
GND
ok, so the R was a resistor of value 5k (probably totally different for you since our transistors will vary). The N was an NFET, and thats it.
things to worry about... on board capacitance. I used 10pf to work this one, and it will make it to within 100 millivolts of the peak magnitude at 20Mhz. You might think that you can just reduce the size of the resistor to get closer at the top...which you can, but then the bottom voltage starts rising also. Best thing to do is strike a happy medium and follow with an inverter on the new supply. Then everyone is happy. If you keep the capacitance on board down below 10pf this should work fine. Hope this helps!