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Op amps in high voltage circuits?

Posted by tlenthe on March 13, 2005 at 18:53:12:
I'm trying to adapt the Jung SuperRegulator for a 65V output voltage. However, the cicruit as drawn powers the op amp from the output rail, which will be too high for any readily available op amps.
Is there a better approach than an appropriate vlaue zener in the power line? Can somone point me to some references on solutions or offer suggestions?
Thanks! - Ted