[sdiy] Do op amps need bypass caps?

[Roman Sowa]

0.1uF alone is tad too small for audio. Good practice is 47 ohms feeding
47uF cap optionally together with 0.1uF one. That gives corner frequency 
below 100Hz, which may be considered as DC quiet power line.

If you don't bypass, and 0.1u is like you don't, all those transient 
signals, caused by varying current of opamp's load, are travelling all 
the way via power and ground traces, and are picked up by other parts of 
the circuit, which sometimes makes nice oscillator out of an amplifier.

Roman

W dniu 2014-08-19 08:06, Chris McDowell pisze:
> 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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