[sdiy] The sound of various Op-Amps

[Andre Majorel]

On 2003-09-21 20:58 -0400, harrybissell wrote:

> The 5532 is best suited for really low input impedance... maybe 1K would
> be optimal and 10K an outside limit.  Higher than that...all your low-noise
> benefits fade away.
> 
> It also has pretty poor offset voltage, which means in high gain
> applications
> you better use it as an AC amplifier only.  I tried a DC coupled amp ONCE
> and found that once I reached the gain I wanted... the output offset was in
> VOLTS.

Thanks Harry, that's interesting. I understand the DC offset stuff
but what makes you say it's only good for low input impedance ? Is
it the high biasing current ? (500 nA for the 5532 vs. 65 pA for
the TL072)

-- 
André Majorel <amajorel at teaser.fr>
http://www.teaser.fr/~amajorel/