<div dir="ltr"><div class="gmail_quote"><div dir="ltr" class="gmail_attr"><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto">Have you tried the suspicious SSI2164 in another application? Just to see if it behaves in other situations before assuming that the Irwin circuit is some special case.</div></blockquote></div><div dir="ltr"><div class="gmail_quote"><div>yes I have tried it in our Quadra module where we use it in exponential mode only and I A/B compared to v2164 versions and they were identical (no issues).  </div></div></div><div dir="ltr"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div dir="auto"><br></div><div dir="auto">Also I'm wondering if there could be some HF oscillation that could lead to this behavior almost invisibly. Are the SSI2164s from the very early batches where internal oscillations at loud signals through low Rin would result in a raised noise floor, or are they the corrected version?</div></div></blockquote></div></div><div dir="ltr"><div class="gmail_quote"><div>I was not aware of the earlier batches with issues. We received our first shipment from them in September of 2018.</div></div></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr">cheers,<div><br><div><div>Danjel van Tijn<br>Intellijel Designs Inc.<br>m. +001 <a href="tel:(604)%20773-2426" value="+16047732426" target="_blank">604-773-2426</a><br><br><a href="http://www.intellijel.com" target="_blank">www.intellijel.com</a><br><a href="https://www.instagram.com/intellijel/">https://www.instagram.com/intellijel/</a></div><div><a href="http://www.facebook.com/intellijel" target="_blank">www.facebook.com/intellijel</a><br><a href="http://www.youtube.com/intellijel" target="_blank">www.youtube.com/intellijel</a><br><a href="http://www.twitter.com/intellijel" target="_blank">www.twitter.com/intellijel</a><br><br><br></div></div></div></div></div>