[sdiy] OTA performance (was SSM chip reissue)

[Roman Sowa]

At low cut off frequency, when integrator currents are really small, 
Zeners are damping the oscillation, because most of the current is eaten 
up by the zener, not the cap - at that small current their voltage is 
way much smaller than, say, at 1mA, the top of VCF frequency.

Roman

W dniu 2017-04-26 o 04:11, David G Dixon pisze:
>
> A couple of zeners across the BP cap ensures relatively clean sine waves.
> However, I still haven't figured out how to get the sine waves to have
> uniform amplitude at all frequencies.  One would think that the zeners would
> ensure this, but they don't.  That's why, when I need really clean sine