[sdiy] TL07x as output stage?

[Olivier Gillet]

Not necessarily... You can alleviate the problem described above with:
* A small resistor in series with the output (if you don't mind the
slight voltage drop when driving low-ish impedances - it's very
commonly done in Euroland for anything that doesn't require precision,
unlike pitch CVs)
* And/or a small cap between V- and Vo, and a resistor "in the loop".
(In Euroland, you'll find this more commonly in circuits producing or
manipulating pitch CVs, such as the output stage of a MIDI to CV
interface).

This has the additional benefit of isolating the op-amp if another
signal is patched there by mistake.

See:
http://www.st.com/web/en/resource/technical/document/application_note/CD00176008.pdf
http://www.analog.com/library/analogdialogue/archives/38-06/capacitive_loading.html?doc=CN0343.pdf
(Figure 8, Figure 3)

On Thu, Feb 25, 2016 at 10:07 PM, neil harper <metadata at gmx.com> wrote:
> Hey guys,
> When referring to the final opamp stage of a line-level output - I recently
> read: "any popular op-amp known to the author, except for the TL06x, TL07x,
> or TL08x series (their high open loop output impedance
> makes them unstable with capacitive loads such as cables"
>
> I've always been a fan of TL07x's (since I have hundreds of them) and this
> is my usual go-to op-amp for anything, including this final output stage.
> Should I be looking for alternatives?
>
>
> --
> //neil harper
> every wave is new until it breaks
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