> TC426 or DS0026?

> But Russell has taught me a good trick with two transistors.
> Is working good with ~18Khz with 2N3904s.
> The gif is made from Jinx Library(TM).:)

It's a good circuit. But for safety it is a very good idea to also 
place a zener diode from FET gate to ground (cathode to gate). 
Physically mount it as reasonably close to the FET as possible. This 
shunts stops capacitively coupled transients which are injected into 
the gate from the drain via the Miller capacitance. It also helps 
stops gate ringing -  a whole black art in its own right. I have seen 
circuits that run forever with this zener in place but die in minutes 
without it. Zener voltage is slightly higher than the V+ gate drive 
voltage.

For faster switching place a small capacitor in series with the base 
drive resistor on the left hand transistor (not shown in your 
diagram).



        Russell McMahon

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