I'm currently working on a project to produce a high speed and high voltage pulse. I'm trying to find a suitable FET. I intended to supply a voltage of about 50v to circuit. And using the FET to go on and off behaving somewhat like a switch, thus somewhat creating a fast pulse.
However the requirement to produce I require a FET, that will allow to have a switching time in the region of 1ns and also needs a voltage threshold about 50v.
MOSFETs are suitable for this case as I remember reading the voltage threshold and switching times directly related. A fast switching MOSFET has low voltage threshold. visa versa. When looking at power MOSFETS, they also don't seem to suitable. BJTs however I cant seem to find out with a high enough voltage threshold.
Sic JFET (silicone Carbide) - The rise time is too slow in order for them to be suitable choice.
If anyone has got any suggestions for a suitable FET , that has both a fast switching time (in the region of 1ns) and has a high voltage threshold (approximately 50v), please let me know.