On Wed, 20 Aug 2008 22:22:22 -0400, legg wrote:

On Tue, 05 Aug 2008 09:54:22 -0400, John Popelish
wrote:

legg wrote:

http://www.national.com/rap/Applicat...570,24,00.html

Which of the example structures in this reference do you
think is most closely related to the one I showed for the
LM78XX? None look similar to my not so educated eye.

I found an example of Band-Gap regulator reference bootstrapping in an
old design note from ~'83. This is Ferranti APN-27 by Bill Roy. Figure
3-7 shows a regular bandgap arrangement, while fogure 3-8 shows
bootstrapping similar to the 780x series.

RL

See...

http://analog-innovations.com/SED/BandGap.pdf
http://analog-innovations.com/SED/BandGapExample.pdf
http://analog-innovations.com/SED/Ba...RealSample.pdf
http://analog-innovations.com/SED/CA3046-BandGap.pdf

I have literally designed over 1000 BandGap references over the
years... they vary with process, operating voltage and current, and
how fast they can be enabled.

Of course I can't show most of them because of NDA restrictions.

...Jim Thompson
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