[sdiy] Discrete OTA

[Phil Macphail]

There are plenty of well (and not so well) documented ways to use the 13700 without the limitations you mention. The criticism is better aimed at the circuit design rather than the 13700 itself, so it is more a personal preference rather than technical merit as to which to use. After all, the SSM2164 input circuit is still the same diff. pair/ current mirror topology as the 13700, but has internal feedback remarkably similar (in concept, not implementation) to the Mike Sims linearisation technique for the 13700. 

Phil.

On 4 Apr 2014, at 01:18, David G Dixon <dixon at mail.ubc.ca> wrote:
> Well, yeah.  The issue here is "character", but IMHO, OTAs have plenty of
> "character" anyway, insofar as they have very poor S/N ratios, a tiny linear
> region, etc, etc.  I changed all my OTA designs to 2164 designs years ago,
> and, not to put too fine a point on it, but Intellijel has achieved market
> dominance partly on the basis of those designs.  I'm never going back to
> OTAs.
> 
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