[sdiy] Blackmer cell

[Ian Fritz]

At 01:11 AM 12/7/05, jhaible at debitel.net wrote:

>As we know from this type of expo converter, there's always a tradeoff 
>between
>stability and response time. (I think you contributed some very interesting
>insight in tiny oscillations that would slightly set off the tracking in VCOs,
>if memory serves.)

Good memory!  Yes I found small oscillations at the servo amp in many old 
circuits, and I improved tracking by removing them.  Nowadays we have 
better opamps, including some that are optimized for servo-loop 
applications, so stability should be less of a problem.

   Ian