Hi,

I am new to circuit design dealing with high-speed signals and I need help finding a solution to what is a simple problem for most of you.

I need a high-Z voltage sense circuit for a high-speed I/O line. I have heard this can be done with a Schottky diode but I am not sure how. The point of the circuit is to probe a signal without disrupting it.

Any ideas or directions?

Thanks,
-George

It is for a pass-through/break-out board for Display Port. The peak to peak of the signal shouldn't be more than 1V. However, I would like to spec it at 2V for extra resilience. The signal is differential if you aren't aware of this. It is like USB.