[sdiy] Transistor Pair Expo Questions?

[Ian Fritz]

At 10:06 AM 10/28/2010, Jay Schwichtenberg wrote:
>I got a couple of questions about the control voltages feed to the base of
>the transistor pairs in an exponential converter.
>
>First at the base of the transistor isn't the voltage around 16-18mv per
>octive? ie 1 voltage change in CV gives 16-18mv at the transistor base.
>
>Second question wouldn't that be the same for both a npn pair used in a VCO
>and a pnp pair used with an OTA?

Yes, close to 18mV/oct in both cases.

Ian