Hi guys-
Thanks a ton for your continued support. Tony posed the question about what my requirements really are. Here are the most relevant:
- Overall, my goal is to have enough of a response so that I can detect when a pulse is missing, potentially by way of a comparator down the line. The pulse widths can range between 0.7ns wide and ~4ns wide and occur about every 15us.
- In my system I will have access to +/-5V supplies. I'm going to go back to looking for an op amp that can utilize these supplies.
- The photodetector will be biased at -5V to minimize junction capacitance.
A quick note, I do have a real photodetector identified with the properties I've entered into the simulation. You are correct to assume that it's an InGaAs detector.
As far as your comment about picking the fastest opamp and hoping for the best, I guess I am having a hard time grasping what the right approach is to selecting an opamp for this case. I hope the above helps.
