what is the purpose of capacitors at 5 and 8? sometihng with

Been a while since I've done audio stuff.
It's probably just filtering out noise in the ground plane. Audio stuff is sensitive like that.

>>8098916
filtering high frequency perturbations.
I think it's called decoupling capacitor in english

>>8098925
>>8098927
how does it filter noise?

>>8098939
Since a capacitor behaves like an open circuit for high frequencies (i.e., noise in a signal), all the crap you want gets attenuated before it can enter the op amp.

>>8098949
All the crap you DON'T want***

>>8098949
>Since a capacitor behaves like an open circuit for high frequencies
Sorry, but that's backwards.
https://en.wikipedia.org/wiki/Electrical_reactance#Capacitive_reactance
>Capacitive reactance is an opposition to the change of voltage across an element.
>Capacitive reactance \scriptstyle{X_C} is inversely proportional to the signal frequency \scriptstyle{f} (or angular frequency ω) and the capacitance \scriptstyle{C}.[1]

>>8098949
>open circuit for high frequencies
isn't that supposed to describe instructors and not capacitors?

>>8099034
y, I think he just made a mistake.

Normally the circuit doesn't include a capacitor, it's just a wire.

So if we want the behavior to stay the same at low frequencies, and to cut high frequencies, a capacitor is good: behaves like a wire at low frequencies, and open circuit at high freq

>>8099066
so why are 5 and 8 capacitors instead of instructors?

>>8099086
I don't know what more you want me to say to be honest

File: TDA2822M.png (68KB, 724x447px) Image search: [Google]

68KB, 724x447px

>>8098916
>purpose of capacitors at 5 and 8?
Supply voltage rejection and soft start (less 'pop' at power-up). That's why they are so large.
>influence of capacitance of conductor?
Stability on complex load? That's what the 0u1/4R7 combo at the output is for.