> I wanted to ask why do we need and how do we choose tha Rgs for mosfet?

Rgs will affect turn off time. Modelling in eg SPICE may be useful.
Reverse diode will affect result. Diode in series with zener does not
seem to make sense as diode across zener esentially bypasses its
effect.
Effect of LC on both side of transformer may be 'interesting".


           Russell
--=20
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