<div dir="ltr"><div>Hi Tom,</div><div><br></div><div>I've had good success simulating this circuit (and others based on various models of the 2164), but without your files it is difficult to know what "node n005" is.</div><div><br></div><div>If you can simplify your circuit down to the simplest possible that still shows the problem you're seeing and you can share it maybe we can help?</div><div><br></div><div>Cheers</div><div>Neil</div><div><br></div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, 22 Aug 2019 at 13:02, Tom Wiltshire <<a href="mailto:tom@electricdruid.net">tom@electricdruid.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi All,<br>
<br>
I’m having trouble simulating the Irwin/Gallo linearised 2164 VCA. The error I get is: “Analysis: Time step too small; initial timepoint: trouble with node n005”<br>
<br>
I don’t really understand what this is trying to tell me since the .tran transient analysis command I’m using is unchanged since a previous typical 2164 VCA where it worked fine.<br>
<br>
I can simulate other circuits using the 2164 ok, so I’m wondering if it’s something particular to that circuit, and specifically whether the feedback loop needs dealing with some how differently?<br>
<br>
Have other people managed to sim this circuit and if so, what did you do?<br>
<br>
Any pointers appreciated.<br>
<br>
Thanks,<br>
Tom<br>
<br>
<br>
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