Bruce wrote:
The Achilles heel of that biasing technique is that the emitter
currents of the
pair of pnp's is affected by the noise on the 20V supply.
Yes, you do need a quiet supply -- I suppose I should have mentioned
that. But sufficiently quiet supplies are not hard to design,
they're just more complex than the "has to be done with just one
ten-cent part" crowd wants (don't expect to use integrated regulators
of any description).
Bruce -- do you know the topology of the Holzworth converter?
Best regards,
Charles
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