Samuel,
I was thinking that the introduction of another voltage, no matter how small would debalance the voltages and alter the CMRR, or am I thinking about it wrong?
Brad,
I'm not sure I follow exactly the two-servo idea though I can see you would probably need less correction from the input servo, and perhaps have less noise introduced? Is it possible the servos may fight each other a bit with overshoot before settling?
And yes, coupling caps really seem to be a pretty good option again, with the improved technologies. I think I will round some different samples up and try it out. Though reading some postings on the subject, capacitor selection is a whole new can-of-worms.
Kris,
I read your paper when it was referenced in another thread. Lots of good work there. Please be sure to post when you make any additions to it. I'd like to keep up.
I too have thought a bit about the "parallel compression" idea, but more along the lines of what Mr George M. does with his logging filters in the 8900 unit. You are thinking of deriving a composite control signal from paralleled (or series) side chains, is this right?
Also in your paper you referred to an article in Audio Am@ture relating to servo design, could you please reference it for me? I'd like to see it.
Many thanks to all,
Paul