I'm currently designing the prototype of a timing instrument. One sensor gives an analog CML (current-mode logic) signal, from an amplifier (ADN2880). One end of the pair is routed to a comparator (ADCMP572).
- Is there a way to use the other end of the pair for 50 ohm ground terminated line? The solution must not induce distortions in the positive side of the pair. It must work at 700MHz-1GHz. DC or AC coupled.
- What I am really interested in is the amplitude of a short pulse (>= 200ps) from that sensor. I would like to put a peak sensing ADC instead of that 50 ohm line if possible. I don't know where to start to design such circuit, so any insight will be welcome.