[sdiy] Obtaining Bandpass and High-Pass Functions From A Four-Pole Low-Pass

Florian Anwander fanwander at mnet-online.de
Mon Oct 15 21:36:15 CEST 2018


Am 15.10.18 um 20:50 schrieb S Ridley:
> It had a 4 pole cascaded 3080 VCF and derived a 4p highpass and a 
> bandpass from it.  That was around 1980.
How should a bandpass work this way? If the highpass is not a real 
highpass but the result of a treatment of the lowpassignal, then you 
cannot put the highpass after or in front of the lowpass - at least to 
my understanding.


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