Re: Input protection

From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-01-07 08:25:12


--- In buildcheapeeg_at_yahoogroups.com, "Joerg Hansmann" <info_at_jhansmann.de> wrote:
> Hi,
>
> here is a new protection circuit that limits user current
> to about 5uA if a worst case input stage failure occurs
> (inputs internally shorted to supply rails).

Hi Joerg,

it looks very nice! You've solved the problem!

But... :-)

You've only measured DC-impedance, and unfortunately we don't get
those fabulous numbers for AC.

So in the specifications we'll have to write:

Input impedance: It depends.

:-)

It will probably work quite nicely anyway, but perhaps not with
INA114 - it would be too noisy.

Regards,

Andreas



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