[sdiy] SSM2164 Filter Cells

[Neil Johnson]

Hi,

Aaron Lanterman wrote: 
> 
> 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 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.

It does - check the specification for "Output Compliance", which is given as typical +/- 0.1V.  Go outside that range and it no longer looks like an ideal current source resulting in distortion.

Neil
--
http://www.njohnson.co.uk