Is a OPA445 AC stable with 100% Cap feedback at HF? - diyAudio
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Old 30th July 2007, 09:07 PM   #1
Fanuc is offline Fanuc  United Kingdom
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Join Date: Feb 2006
Location: Anstruther, Fife
Default Is a OPA445 AC stable with 100% Cap feedback at HF?

Hello,
,
1, The subject title is self explanatory - it would if possible, allow very ESR caps on the output without affecting phase stability margins so much.

2, Is there anyway of increasing the Zout of a opamp but without increasing the rising HF low Impedance? The OpAmp drives an emmiter follower in this case. Obviously the OLG is greatest at LF. With at HF I would like perfect low Zout but LF alittle higher Zout!.

Regards

Kevin
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