[sdiy] Non-inverting output buffer

[Antti Huovilainen]

On Tue, 27 Apr 2010, David G. Dixon wrote:

> Can you state, for dummies like me, just exactly what would constitute a
> "capacitive load" which might (or definitely would) cause oscillation of an
> unadorned follower?

A capacitor connected to the output or the parasitic capacitance of long 
leads between PCBs. The maximum allowed capacitance depends on the opamp, 
but I wouldn't connect any external connector without inserting some 
series resistance. A typical guitar cable for example seems to have 
capacitance of about 100pF / meter. As was mentioned before in this 
thread, even a 10 ohm resistor allows some isolation from the effects of 
capacitance.

Antti

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