Xpander/Matrix12 filter design

A.S.P. ms20 at serv.net
Thu Mar 27 15:39:44 CET 1997

He took the CEM ASP and combined it with an analog switch or a multiplexer
(CD4066 or 405x).


On Thu, 27 Mar 1997 jwilmin at hzsbg01.nl.lucent.com wrote:

> Howdy,
> In the Oberheim Xpander/Matrix12, the cem3372 vcf/vca chip is used, right?
> This is however a 4-pole low pass vcf. How did uncle Tom manage to make all
> those other filter types with this device (high pass, band pass, combinations)??
> Or did they use other chips (or discrete designs) in addition, which I don't
> know of.
> Anyone who knows how this filter section is designed??
> Thanks,
> Janwillem Wilmink

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