[sdiy] Gilbert Cells and VCAs with Predistortion

[Ian Fritz]

At 02:11 PM 7/3/05, Ryan Williams wrote:

>the .1% you measured on the 13700 looks pretty good. I think I remember 
>someone else saying they didn't have such good results? I think it's time 
>for me to actually start measuring performance. I won't know anything 
>until I can do that.

I built a variant of that circuit.  It had good performance but some 
residual temperature drift that was a bit more than I could accept.  The 
tracking was fine (better than 0.2%).

   Ian