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close-loop stability with .lstb command in ELDO

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.lstb eldo

Hi all,

I need analyse a close loop system stability, so I use .lstb command in ELDO.
My test case circuit is very simple as attachment and my commands according to eldo's manual are:

vstb v1 v2 dc 0 ac 1
.lstb vstb

.op
.ac dec 100 0.1 1g

.plot ac lstb_db
.plot ac lstb_p


However I found the dc operation point is not correct. Is there any suggestion for .lstb application? p.s., my eldo version is ELDO v6.9_1.1 Production

Thanks!
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