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The Other Hawksford IV (nested loop op amps)
The Other Hawksford IV (nested loop op amps)
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Old 6th December 2012, 05:35 AM   #11
jcx is offline jcx  United States
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Join Date: Feb 2003
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free manufacturer macromodels can be far from realistic

the output is usually a spice controlled ideal source - no output transistor properties are simmed

which is poor for simming pulse performance of older op amp built on semi prcesses with slow pnp - if you look with a scope at the real chip' output for mA steps you can see the pnp pull down "feedthru zero" recovery edge is bigger, recovery is slower

even with the modern better complementary isolated Q processes the op amp models are often poor on output properties - more critical as Cload stability becomes an issue - I don't really trust the sims I've posted here due to the unrealistic output modeling

Last edited by jcx; 6th December 2012 at 05:39 AM.
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