[sdiy] 2164 Expo correction

[lanterma at ece.gatech.edu]

On Mar 25, 2011, at 6:21 PM, David G. Dixon wrote:

> However, based on the quadratic response, I tried replacing the Ebers-Moll
> model of a BJT with the square-law model of a JFET, and it would appear that
> a JFET is perfect.  Now my quandary is that it looks like I'll need both the
> JFET and a BJT (each with its own biased, inverting, gate-driving opamp)
> sending separate currents back to the CV summer to completely correct the
> tracking of VCOs with 2164 expo converters.

In addition to JFETs, you might want to check out MOSFETs too.

- Aaron