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There a whole bunch of "eq" circuits of various types and more
are coming.
This is a 10 band graphic equalizer that I have used as a benchmark
since my early days of working on simulation. I have it in more forms
that are not here. By using different models for op-amps, cascading
them, and other tricks I have used it to test just about everything.
This is a working product of my design that was (and may still be)
very popular among record producers in the late 70's and early 80's.
It was designed using a predecessor to ACS on a TRS-80.
eqboost.ckt the 1k band is boosted 12 db
eqflat.ckt all bands are set flat
eqmodify.ckt both. run it batch.
eq?-????.ckt A bunch of them cascaded to test the sparse matrix.
Try these on Spice if you have lots of CPU time.
ACS time growth is almost linear. Spice-2 growth is quadratic.
These probably won't work on a PC.
The biggest one has over 9000 nodes.
Don't bother with them on MSDOS. Not enough memory.
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