[sdiy] The TL072

[Magnus Danielson]

Paul,

Paul Schreiber skrev:
> Drop-in.
> 
> Now, here is something to think about :)
> 
> There is a good chance that the 'noise' is not internally generated by 
> the TL072. Rather, it is being picked up and amplified by that stage. In 
> many cases, adding a 'better' op amp will make matters *worse*, because 
> of the higher bandwidth of the new part, even *more noise* gets through.
> 
> In other words, swapping out the 'last op amp in the signal path' may 
> not achieve what you are looking for.

Well, but the question here is about noise in the spectrum of interest, 
20-20kHz or there abouts. It should be fairly unchanged from a change in 
bandwidth as long as we keep to fairly linear processing such as that of 
a mixer.

Cheers,
Magnus