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A muting delay & DC offset protection circuit from amb - Page 9

post #121 of 126
10/13/05 at 7:17am
Thread Starter 

Thread move

I will now discontinue participation in this thread. Here is the
new ε12 discussion thread at Headwize.
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post #122 of 126
10/13/05 at 10:34am
Quote:
Originally Posted by amb
As for voltage handling, yes, the OPA551 can handle lots of it, but even before that, the pair of 2N3904/3906 serves as a voltage regulator so the OPA551 never even sees any more than +/-12V.
Not to mention the 24V zener which also serves as part of the voltage regulation and limiting circuit. I believe that Amb had stated in his initial posts for the design that it could handle up to +/- 30Vdc, or 60 Vdc cumulative, but that if you were powering at +/- 18V or more to put TO92 heatsinks on Q1/Q2.

Quote:
Originally Posted by amb
Pars, if you use a OPA551 you'll find that the problem you encounter to essentially disappear. The TL071 does not have low-enough an output impedance to serve as an effective virtual ground splitter that is being asked to sink many tens of milliamperes without some voltage shift.
Yes I did note that it was inadequate for this duty in my post and what I saw was not unexpected.

I really need to get an order in to Digikey...
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post #123 of 126
10/13/05 at 11:09am
Quote:
Originally Posted by amb
I will now discontinue participation in this thread. Here is the
new ε12 discussion thread at Headwize.
Do you want this one closed also? Just let me know if you do.
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post #124 of 126
10/13/05 at 3:51pm
Thread Starter 
Hi voodoochile, go ahead and close the thread. If other members want to talk about this circuit here they can open new threads.
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post #125 of 126
10/13/05 at 6:11pm
I would leave it open Mark so there is some continuity rather than 25 threads on the same topic
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post #126 of 126
10/13/05 at 6:12pm
...cool...
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