[sdiy] OTA performance (was SSM chip reissue)

[Mattias Rickardsson]

On 27 April 2017 at 16:57, Richie Burnett <rburnett at richieburnett.co.uk> wrote:
>> But if the gains match well at 0dB, pretty well at -20dB, and not so well
>> by the time you're down at -80dB, then you'd expect resonance to drop off at
>> lower frequencies.
>
> Or it could do the opposite, depending which of the two integrator gains is
> lowest/highest!  Like in that paper you referenced about varying SVF gain by
> manipulating the integrator gains.

True!
This is intriguing. Does this indicate that the loss of resonance
towards the bottom end is actually caused by another effect than the
gain mismatch? Possibly capacitor leakage (e.g., through zeners) or
something else?

/mr