So I'd like to pulse a current to a load from a transistor. I can use a µ-controller to trigger a transistor. The µ only has a minimum pulse length of about 100ns or greater. But I would like to have the current flow through the transistor for a much shorter pulse length than 100ns. Maybe a pulse length of 5ns or even 10ns would do. 1) What is the best way to do this type of fast switching? Should I have the current always flowing through the transistor and then turn it off for the short pulse length, or have the current off normally and have the transistor control when it flows (for 5ns or 10ns)? 2) What options do I have regarding specific model numbers?