[sdiy] Maxim analog switch ICs

[john mahoney]

Glen:
> I've seen this sort of suggestion before somewhere, but I have no personal
> experience with this sort of circuit. I can't really comment on it's
merits
> or limitations, but it does seem like an interesting approach.

Rene:
> The key idea is that the input voltage is first converted into a
> current, and then converted back into a voltage. So the switch never
> sees a voltage greater than a couple of millivolts, if its on, and less
> than +-0.6V when its off. Thus a lowly 4000 series switch can handle
> 15Vpp signals. Its much like the corresponding jFET circuits.

It is interesting. I guess it's a matter of the chip's current-handling
capacity, rather than its voltage limits.

Please don't bother trying to explain it in any more depth, as we have
passed the outer limits of my knowledge. :-)
--
john