[sdiy] CEM VCF transconductance stage difference!

[rizacan]

Hi
The first three stages are classic lowpass OTA filters with gain of 1 but
the last OTA lowpass stage has gain of 50,75 or 100. So in order get the
same cutoff frequency of  the other stages the last one  using 1/50, 1/75 or
1/100  capasitor values of the other stages.
Thanks


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl]On Behalf Of karl dalen
Sent: 26 Aralýk 2008 Cuma 21:37
To: synth-diy at dropmix.xs4all.nl
Subject: [sdiy] CEM VCF transconductance stage difference!


Did anyone figured out why Doug Curtis used such a (gm) difference between
the last transductor and the preceding 3 in his filters? Factors of 50,
75 and 100 times can be found in his various designs.

Reg
KD


      __________________________________________________________
Ta semester! - sök efter resor hos Kelkoo.
Jämför pris på flygbiljetter och hotellrum här:
http://www.kelkoo.se/c-169901-resor-biljetter.html?partnerId=96914052

_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy