[sdiy] CEM3372 passband gain trick?

[Ove Ridé]

On 12 August 2012 07:40, David G Dixon <dixon at mail.ubc.ca> wrote:
>> > P.S. What does "VCF Uses Open Loop Design for Enhanced
>> Sound Richness" mean?
>>
>> Probably means that instead of using (the equivalent of) an
>> opamp with capacitor feedback, they use (the equivalent of) a
>> buffer followed by an RC filter with controllable resistance
>> in each filter stage.
>
> Why would they be any different?  They both give the same transfer function.

In theory, yes. There may or may not be non-linearities in the circuit
that makes a subtle difference. I was just trying to interpret the
text, though.

-- 
/Ove

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