I need a signal that most of the time will work as a power supply for the microcontroller but at some external event a positive pulse will be generated and added to the normal power supply. Power supply is set once and it never changes, however the pulse will be different.
My question is: I have a powerful glitch generator that can provide only a voltage pulse so I need to add a stable power supply. What is the best way of doing it? I want to keep the parameters of the glitch as close as possible to the device characteristics (rising and falling edges are around 200 ps), hence the schematic does not have to introduce a big distortion to it. Could you give me some tips or descriptions for doing it.
I am not an electrician, I am mathematician doing research in software and I need to disturb this software during the microcontroller run by this exotic way.