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RE: Voltage regulator details

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Hi John,
Very elegant circuit! And as elegant an explanation, though I was wondering about how you determined the value of C2. I've tried simulating rejection vs frequency and noticed there is some play between the various time constants in there. To be honest, I'm getting some slightly odd results and need to double check my sims and mosfet models.

Did you try the circuit without C2 at all? Wouldn't be a cascode at ac without it I suppose, as the load is on the source of Q1 rather than the the drain of Q2.

Also wondering which shunt regs you'd compared your circuit to; I've contemplated Emile Sprenger's and (similar) VSE the Camille designs, but yours would be far less hassle, not to mention efficient. Thanks very much indeed for sharing this one!

Best,
Chris


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