[sdiy] SSM2164 stability

[Neil Johnson]

Hi,

David G. Dixon wrote:

>> Since the SSM2164 is the topic of the week... What's the story behind
>> the 500R / 560pF or similar at the input of the SSM2164? The  
>> datasheet
>> states "for stable operation", and it looks like a passive 10kHz
>> low-pass (with a zero that flattens out the attenuation after  
>> 500kHz),
>> but why? Have you encountered any situation where it actually had a
>> noticeable impact on the output, or in which it totally screwed the
>> circuit when left out?
>
> I just blindly put them on.  Perhaps it was a disgruntled Analog  
> Devices
> employee having a nasty little joke!

Tom Farrand wrote a little on this topic.  You can find his email in  
the synth-diy archive:

http://search.retrosynth.com/synth-diy/search/lookit.cgi?-v0808.199

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