[sdiy] Op amp slew in audio circuits - sims vs. real life

[Ian Fritz]

I regularly use better devices, and not just because of speed -- offset 
performance is just as important.  I usually try something like the OPA134 
which is better in both departments. I have been using the OPA2227 in my 
expos because offset causes temperature drift.  If you really want the 
fastest possible switching, then use a comparator chip.

Ian


At 06:19 AM 4/8/2014, Justin Owen wrote:
>A general question... I'm assuming most of us throw the TL072 or similar 
>at most of our audio circuit op-amp requirements right? Can any of you 
>give some examples of where you specified an op amp with better/faster 
>slew specs because standard op-amps weren't fast enough? Asking because 
>I'm working on a pulse output circuit (frequency up to 20KHz) that I'd 
>like to shave every last µSec out of in order to get the sharpest 
>response - but I'd also like a reality check on how much to worry about 
>the slew and slight imperfections I'm seeing in sim (using Universal Op 
>Amp 2) and how that will translate to real life. Yes, at some point I will 
>breadboard/protoboard it - just be good to get a general consensus before 
>that. Ta! - J _______________________________________________ Synth-diy 
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