[sdiy] 2164 stability valuable to

[Jason Nanna]

I don't have much to add on the subject but am interested as well.  Irwin's linearization paper used 100k and maintained the 500/560p input network.  The only mention I found in the datasheet is just where it is specified explicitly.  David, I've looked at some schematics you've posted and I'm not sure what is the benefit of maintaining a specific 30k input impedance - is this just matched to the input compensation network?  Or just picking one precision value to maintain gain accuracy?  I do see that the SSI datasheet recommends 20k, with the identical stability network.  I understand THD+N figures improve with more current to the input,

> On Wed, Jun 27, 2018 at 11:27 AM, David G Dixon <dixon at mail.ubc.ca> wrote:
> Hello List,
> 
> This is mostly a query for Neil Johnson:
> 
> If I change the 30k resistors around 2164 to 100k, what should the 500R-560p
> stability network be changed to?
> 
> According to my calculations (which are probably wrong), the 3dB point with
> the 30k resistor is around 4kHz.  If I put in a 100k resistor, it goes down
> to around 1.2kHz.  Obviously I'm doing this wrong.
> 
> Thanks in advance!
> Dave Dixon
> 
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