303 clone filter and VCO

[Rob Hukin]

>The biggest difference is the use of diodes as dynamic resistances in the
>303 filter as opposed to transistors in the Moog design.
>The output of each pole in the Moog filter is 'buffered' before it enters
>the next pole.
>Each stage has high input impedance and low output impedance.
>With the diode filter each stage has high input and output impedance.
>Consequently, there is a complex interaction between the poles in the 303
>filter.

I'm not sure I follow this - sure, there are some differences in biasing
between the two (Moog and 303), but a transistor with it's CB junction tied
is still operating in active (transistor) mode IIRC, not simply working as
a diode...?

rob.