[volt-nuts] LTZ1000 reference appnote question

[Bob Smither]

On 11/07/2012 06:02 PM, Fabio Eboli wrote:
> Hello, in this thread on eevblog:
> 
> http://www.eevblog.com/forum/projects-designs-and-technical-stuff/does-anyone-know-what-this-diode-is-for/
> 
> 
> a guy named DiligentMinds.com asked the question
> about why there is a 1N4148 diode on the output of
> the opamp in the LTZ1000 reference circuit, the one
> designed by Jim William in the appnotes, that can
> also be seen on the first page of the datasheet:
> 
> http://cds.linear.com/images/product/1203_app_1.JPG
> 
> Now I'm curious,
> anybody knows the answer?

I believe it it to prevent negative lockup of the circuit output upon start.
-- 
Bob Smither, PhD                                   Circuit Concepts, Inc.
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                   "If you want peace, work for justice.
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Smither at C-C-I.Com  http://www.C-C-I.Com  281-331-2744(office)  -4616(fax)
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