[volt-nuts] LTZ1000 reference appnote question

Bob Smither smither at c-c-i.com
Thu Nov 8 01:22:22 UTC 2012

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.
                   "If you want peace, work for justice.
                  If you want justice, work for freedom."
Smither at C-C-I.Com  http://www.C-C-I.Com  281-331-2744(office)  -4616(fax)
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