[sdiy] Filter Structure Question

[harrybissell]

Magnus Danielson wrote:

> I *did* recommend there to be a cap there, and Scott has included that into
> his schematic. Now, a cap isn't regulated power, but it is the local energy
> reservoir and will reduce the effect. Also, in this case we should not look at
> it as being gates but rather inverting amplifiers. In the case that one wants
> isolation, then separating the amplification over several chips, each with its
> individual powersupply and capacitor would be possible.
>
>

Yes... but if those are sepatate packages... they will all have their own
preferred
quiescent level.  What is an even match for one may substantially bais another one

more positive or negative.

I realize that the esteemed Mr. Gravenhorst (may his synths be forever fat :^) is
not
looking for perfection.  Too much variation might make the whole thing
unworkable...
and there is no easy solution.

It may be that using all the packages in linear mode might exceed power
dissipation for
the package.

And thanks (Magnus) for clarifying the capacitor on the bias inverter output. I
understand
now. Eventually, the capacitor will cue up to the bias point, and be a low
impedance.

H^) harry