[Amps] small signal diodes

[R at contesting.com]

On Apr 5, 2006, at 7:03 AM, Dan Sawyer wrote:

> All,
>
> I have been repairing an 8405a and have noticed something about the
> probe sampling diodes. The HP sampling diodes have a peculiar curve 
> that
> other diodes do not seem to have. They have a very sharp 'knee' and a
> very steep rise. Other diodes do not have that sharp knee or near
> vertical rise. In looking for a replacement, what type of diodes would
> have this characteristic?

hot-carrier diodes.  The last I heard NEC still makes them.
>
> Thanks,
>
> Dan
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Rich Measures, 805.386.3734, AG6K, www.somis.org