[sdiy] Matched Trannys for linear V->I?

[Scott Bernardi]

For a linear voltage to current converter you only need a single transistor in
the feedback loop of an opamp.  See
http://members.home.net/sbernardi/elec/og2/og2_dual_linear_vca.gif around U2:D.

Dr Strangelove wrote:

> Are there any devices which would make creating a linear voltage to current
> converter easier?  I'm thinking something like a matched pair of transistors
> who are wired for a linear converter (i.e. the IC has 4 pins and contains
> two matched pnps with emitter 1 connected to base 2).
>
> Thanks for the help.
>
>          -=<Jonathan Pratt>=-
>        (Phdinfunk at hotmail.com)
>
> _________________________________________________________________
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--
Scott Bernardi
sbernardi at home.net