I'm planning to design a state variable VCF and I see there are multiple options to do so.
One thing I've seen that you can use OTA or VCA for the voltage control but I would like to know if there is any sonic quality/flavour difference.
Are the any key differences between these two technologies that would help me choose the right one?
One thing I've seen that you can use OTA or VCA for the voltage control but I would like to know if there is any sonic quality/flavour difference.
Are the any key differences between these two technologies that would help me choose the right one?
The key statistic is the linearity - whatever kind of variable gain amp you choose.
A VCA isn't a technology, it just means a voltage controlled amp.
There are also VGA's that have a fixed set of gain settings, implemented by switched
feedback networks - these tend to have the best linearity.
A VCA isn't a technology, it just means a voltage controlled amp.
There are also VGA's that have a fixed set of gain settings, implemented by switched
feedback networks - these tend to have the best linearity.
OTAs as well as VCAs are more or less obsete analogue building blocks. In the past I used lots of OTAs and can say that linearity as well as signal-to-noise ratio are mediocre at best.
I understand. So I see the VCA will have better linearity and SNR features...
Thanks for your answers.
Thanks for your answers.