What is the purpose of a diode in parallel with a BJT in a MOSFET drive circuit?
Looking at the bottom pnp transistor and the &quot;high&quot; frequency model of both devices, the base emitter capacitance (-Cbe+) discharges through the diode capacitance, and then to ground (note polarity).


I ran a quick simulation with common parts and didn't make much difference at 5kHz.