Need suggestions for over voltage protection

[ljp2706]

Does anyone have suggestions for an over voltage protection circuit? I have a signal that slews very fast, where a comparator will not be quick enough to react. The only ideas I could come up with were a clamp structure or a series MOSFET with the gate biased to saturate the signal but that impacts performance since the device has a lot of variability. ESD won’t work for this application and it cannot draw any current from the signal as it is high impedance.

 

[KlausST]

Hi,

Electronics design has to do with voltage, currents and their calculation.
But there is not a single value in your post.

So without knowing
* about the typical (wanted) signal range..
* about the "overvoltage range"
* impedances
* energies
* application goals, like maximum distortion ..
it's only wild guessing, and time consuming

Klaus