[sdiy] Do op amps need bypass caps?

[David G Dixon]

Generally, opamps do not need individual bypass caps.  However, if you are
using them as comparators, then it's probably a good idea.

I typically put one 10uF electrolytic and one 100 nF ceramic cap on each
rail for each module, and I generally don't have any problems.  However, if
I have anything generating fast pulses (like a comparator), I often bypass
that individually. 

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of 
> Chris McDowell
> Sent: Monday, August 18, 2014 11:06 PM
> To: synthdiy diy
> Subject: [sdiy] Do op amps need bypass caps?
> 
> Hi guys, 
> 
> I was taught to put 0.1uF-ish bypass caps on every IC, every 
> time, but recently have come across statements declaring that 
> op amps in the audio range and below don't need them. Is this 
> true? Is this controversial? What's the real scoop here?
> 
> Thanks,
> Chris
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