On 1/31/2013 12:20 AM, Bruce Griffiths wrote:
With some care its possible to make the emitter current of the shunt
transistor approximately PTAT so that, at least for small signals the
temperature dependence of the rejection is reduced significantly.
Sorry, what does PTAT mean? I'm not familiar with that term.
Its also possible to build a feedback style shunt regulator that has
considerably higher supply rejection than the Wenzel circuit using an
opamp and a shunt transistor together with a small resistance in
series with one of the supply leads.
Bruce
The Wenzel article gives three circuit topologies. The third shows an
opamp feeding a 2N4401 across 0.05 ohm in the power path. Sounds like
what you are describing. Did you miss that one or are you describing
something different?
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