Re: voltage to resistance convertor?

"Andrew Howard" <ask.me@xxxxxxxxxxxxx> wrote in message
news:SLw7e.11499$5F3.11273@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> If I have a source of variable voltage ( a sweep generator for example), is there any way to create a source of varying
> resistance in proportion to the voltage?
>
> About the only way I can think of off the top of my head is a light/LDR combination, but I doubt that would be very efficient
> or accurate.
>
> Anyone have any better ideas? Preferably simpler ones, even if it is slightly less accurate. Or maybe someone knows of a
> resistance sweep generator...
>
> Thanks
> Andrew Howard


If your resistance range is not too large, and the
signals you will impress across it is small enough,
a quad MOSFET array can be made to perform
that function with an op-amp controlling it.

What input and output range to you need, over
what frequency range, with what distortion?

Another approach is to use a multiplier IC, hooked
up as a divider, with voltage input and current fed
back from the output to the input. But again, the
required specs are necessary to proceed.

--
--Larry Brasfield
email: donotspam_larry_brasfield@xxxxxxxxxxx
Above views may belong only to me.


.

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