Sorry Lads, really dumb opamp question

[Martin Czech]

:::Sometimes the resistor-less unit does not work so well
:::with all op-amps and loads, especially capacitive loads.
:::Putting a resistor between the output and the inverting
:::input can help these cases. I suspect the mechanism is that
:::the input is decoupled a little from the output by the RC
:::of the resistor and the input capacitance. Usually I just'
:::use the resistor-less method, but its good to have the trick
:::if you need it.

?

I do not understand how a resistor including some more parasitic 
capacitance and making the additional feedpack pole worse
can help when you allready have a lag problem due to large capacitive
load.

Maybe a resistor with parallel capacitor would make more sense because
of some lead effect, but that would be dominant only in configurations
with another resistor from "-" to reference.

Resistor do have some parallel capacitance, but very little.

I guess decoupling the output with resistor or inductor
would be more applicable.

m.c.