> I find they work even better with POWER FETs.
> After all why do they have a gate protection zener included 
> in the 723?

IIR I once saw a circuit that used the 'pass' transistor of the LM723 in
common-emitter mode for some extra gain in the error correction. I think
they needed that zener for that circuit.

Wouter van Ooijen

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