From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-01-07 08:28:30
--- In buildcheapeeg_at_yahoogroups.com, "Jim Meissner" <jpmeissner_at_mindspring.com> wrote:
Hi Jim,
> Dear Joerg and Group:
>
> I have been following the Input Protection discussion, and in my
> opinion it is going in the wrong direction with the relays, etc.
>
> The FIRST consideration should be for the patient safety rather
[...]
> The SECOND consideration should be for the input amp. You have
[...]
> The THIRD requirement of dealing with a catastrophic failure of the
> op amp, is in my opinion a mute point. If you properly clamp the
> transients and protect the op amp inputs, it is not likely to fail.
Thanks for your input. This means we can put that part behind us.
The reason why it may sound like we've ignored mains isolation is
because that it is so easy to do.
So, boiling it down:
* ESD protection (using transistors)
* optoisolation, preferrably not using a regular optocoupler but more
of a transmitter/receiver design.
* battery operation
is necessary and sufficient?
> Build something!
Working on it ...
/Andreas
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:36 BST