GIC String Filter - first experiments (was: [sdiy] FilterBanks& CSound)

[Scott Gravenhorst]

harrybissell <harrybissell at prodigy.net> wrote:
>LOL...
>
>no. I have a whole TUBE of LM3900 and only a few BBD.  I just began to understand the
>true nature of the 3900 as current controlled voltage source... a real useful block.

Ok, please please please (on knees) bend my ear about this.  What can we do with a
current controlled volage source (esp. in SDIY)?  

I have always tried to work with voltage signals where possible, tho I know currents
are absolutely necessary for some things (controlling the charge current of a cap).  I
try to avoid situations that dump current from rail to ground when the same function
can be done with a voltage at low current (hence my love for the way CMOS logic works).

Inquiring minds (and others as well) want to know...

>Imagine
>my surprise to hear Bob Pease slam the chip as a piece of sh!t (my original opinion
>btw).
>
>I guess the principle and practice of the chip do not match well... and it is indeed a
>crappy
>"opamp" if you call it that.  The ARP filter is really brilliant, imho.
>
>There is a "Dual Norton"  (LM359 iirc) which I have not tried, Bob Pease did not have
>an opinion on that one. Its not real cheap like the 3900.
>

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