31 Aug
2014
31 Aug
'14
9:13 p.m.
Sorry Fons, if you google "moog filter schematic" you will see 3 stages, where a
stage is a capacitor in series with 2 transistor emitters (which have a diode V/I
characteristic).
About that complicated code: I saw implentations with a lot of code lines, and preventing
oscillations originating from the non-linear tanh functions needed a lot of care.
On 08/31/2014 02:03 PM, Fons Adriaensen wrote:
The famous Moog 'ladder filter' has 4, not 3
stages, and doesn't use diodes but transistor pairs as a non-linear impedance. The
result is similar to a tanh(x) function in each stage. It doesn't take
very complicated code nor excessive CPU. Ciao,