Michael Watterson wrote:
> you can divide down to say +/- 12V and use CMOS switch.
> Then higher precision for the final attenuator.
>=20
> What accuracy is needed?
>=20
> 1kV needs 1M Ohm for 1mA, More than 4M7 precision resistors are expensive=
..
> Calculate assuming 4M7 resistors and 47k Ohms. The tolerance of the 47k=20
> Ohm resistor can be much worse than the 4M7 as you are dividing by 100

In what universe does that last sentence make any sense at all?

Think about it.

-- Dave Tweed
--=20
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