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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.

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  • \$\begingroup\$ What is the output load you are driving? \$\endgroup\$
    – Andy aka
    Nov 6 '18 at 10:14
  • \$\begingroup\$ I require a minimum 30v to drive the component. If that's what you mean ? \$\endgroup\$ Nov 6 '18 at 10:17
  • \$\begingroup\$ No, what is the output load you are driving - the component you refer to. \$\endgroup\$
    – Andy aka
    Nov 6 '18 at 10:21
  • \$\begingroup\$ i'm going to be driving a single OLED cell. If i can get one. \$\endgroup\$ Nov 6 '18 at 10:22
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    \$\begingroup\$ Well, you can't design the driver without knowledge of the load. \$\endgroup\$
    – Andy aka
    Nov 6 '18 at 10:46

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