[sdiy] Query about best cap type for '2164 stability network

Neil Johnson neil.johnson71 at gmail.com
Fri May 4 14:59:03 CEST 2018

Hi Tom,

> Neil Johnson wrote:
>> Umm...no.  The input pin is actually the summing node of an inverting
>> op-amp circuit.  The RC circuit forms a lead-lag compensator to
>> stabilise it.  The values shown in the ADI datasheet are optimised for
>> a 30k input resistor.
> I see! It’s phase compensation. I thought wrong. Thanks Neil.

Yes, and you can apply the same technique to op-amps as well to
improve high-frequency performance (although well above the audio
range unless you're after very high gains).


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