[sdiy] FET for VCO cap discharge

[Ian Fritz]

At 02:06 PM 10/23/05, Mike I. wrote:
>Hi Ian, JH
>Might be worth taking a look at the voltage present at the op amp (-)
>input - it might not be sitting steadily at zero volts at virtual ground -
>could be spiking briefly during the reset time if the op amp isn't fast
>enough to keep the servo loop closed. If the (-) input went just a couple of
>hundred mV below ground it would be enough to make the FET conduct quite a
>bit more current.
>Regards, Mike

Interesting point.  I'll try to have a look at that.

   Ian