A muting delay & DC offset protection circuit from amb

[amb]

I will now discontinue participation in this thread. Here is the
new ε12 discussion thread at Headwize.

 

[Pars]

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...

 

[Voodoochile]

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.

 

[amb]

Hi voodoochile, go ahead and close the thread. If other members want to talk about this circuit here they can open new threads.

 

[rickcr42]

I would leave it open Mark so there is some continuity rather than 25 threads on the same topic

 

[Voodoochile]

...cool...