I have a 5Mhz signal which is being amplified by an OPA847 opamp.
In good conditions I get a voltage swing of ~120mV output from the opamp, in bad conditions I get a slightly noisy ~80mV p-p. I am hoping for the final circuit to be single supply, the current test setup uses -5v/+5v.
The scope trace below is from good conditions, modulation can be seen in two places where the phase inverts:
My question is quite simple: what is the best way to turn this signal into a square wave for processing by digital logic?
I have considered standard digital logic gates but I don't believe the swing is large enough. I have also considered a comparator with the input signal (biased at Vcc/2) compared to a fixed Vcc/2. I assume this would need some hysteresis but am still not sure if it's the most practical solution.