AD811,AD818

[Tony Clark]

> what's the deal? I looked for these transistor pairs to see if someone
> still had some for sale and all the information shows them as Video
> amplifiers. The Application notes even show them like an op amp. How can
> they be used as matched pairs in old circuits?

   Well they don't show a simplified schematic of the IC, but the 
Metalization Photo shows that the IC has much more in it than just a 
matched pair of transistors.  Compare the photo with a MAT-02 
metalization photo and you'll see what I mean.
   So my guess is that you can't use this part that way.

   Cheers,

   Tony

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