[sdiy] SSM2164 Filter Cells

[Aaron Lanterman]

On Jul 21, 2009, at 2:42 PM, Jay Schwichtenberg wrote:

> So far I've only seen integrator based filters for the 2164, nothing  
> like
> the regular OTAs (cap between OTA output and output current amp).  
> Anyone
> know why this is, are there issues with 2164 in this configuration?

I'm not sure I 100% follow what you mean - do you mean why don't they  
have the current dropping through a cap to ground, then buffered? Are  
you asking why they all feed an inverting current-to-voltage integrator?

I seem to recall the datasheet saying that the output of the 2164  
needs to be held at virtual ground by an op amp for it to be happy.

- Aaron