> Better get some particular expertise in this area... wait,
> I suspect you are just joking: almost all you've written
> is a nonsense beginning with "cable DC resistance is
> infinite" at "as high voltage as the cable and your analog
> electronics can stand" and so on.
>
> Cable DC resistance could vary tremendously, I think.

Not when the other end is open, as I specified.

The reason for the high voltage (probably around 20V in practice) is to
increase the signal to noise ratio.  There will be some fixed noise in the
circuit, and the opamp will have an offset error.

Calling everything nonsense without any arguments to back it up is a waste
of time.  What specifically do you believe to be incorrect?


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