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Small Cap between OpAmp Input Pins?


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Hi

In the following picture which belongs to a Tone Control Circuit, Can anybody tell me what that Small Value Cap (10pF) Is for?
Between In+ & In- Pins

I remind I saw the reason somewhere Once, but todayI looked it up in all my books, But did,'t find that.

I guess it is some how related to OpAmp Input Capacitance?

Thanx in advance
Shahriar

post-1483-14279142649465_thumb.jpg

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