[sdiy] Taming an oscillating unity-gain voltage follower

[Tom Wiltshire]

On 15 Mar 2009, at 11:48, JH. wrote:

>> Having done so I was both dismayed and delighted at the same time to
>> discover that the *buffer* could easily be made to oscillate at  
>> around
>> 760kHz.
>
> That's to be expected.
>
> If you don't need zero output impedance, there's an easy cure: Put  
> a 470 Ohm
> resistor between opamp output and the cable.

Can you prevent this oscillation by sticking a cap in to roll off the  
gain at high frequencies, in a similar way to the common practice on  
inverting unity gain op-amps?

I don't know - I'm asking.

Thanks,
Tom