Current annotation on the symbol

In order to annotate currents, you need to save the currents in the DC analysis. That can be done using Outputs->Save All and selecting "Select Device Currents=all" if it's a primitive device. If it's not, you could either ask to save the currents for that block in ADE (Outputs->To be saved->Select on Design and then click on the terminal in question or the instance to save all the currents, or use Outputs->To be saved->Select by Subckt Inst to control current saving in the hierarchy).

Be careful about saving too many currents though as it can impact performance. Not a big issue for a small block, but it's expensive to save all subckt currents throughout the hierarchy in a big design in transient analysis, for example.

Regards,

Andrew.

Thanks Andrew. It works fine now. I was saving all currents but still wasn't able to annotate currents. However, after saving selected, it works. I had a follow up question on this: How do we make an expression to be annotated on the symbol pin? For instance, I want an average current to be annotated on the symbol of a digital circuit, max value, min value, etc; Basically, I am looking for something like this: max(cdsTerm("vout")),average(cdsTerm("vout")) annotating max of vout voltage and avg current through vout pin. 

Regards,

PT

The annotation system doesn't support that - this would require an enhancement. Note that it wouldn't be done by surrounding the cdsTerm functions with max or average anyway since these functions just return a string representing what is going to be annotated (using the configurable annotations mechanism). So to do this properly it would need the annotation system to allow you to do this. 

One concern would be that this could be quite slow to annotate - imagine a long transient simulation with millions of points and having to compute and annotate the max or average value of each terminal voltage and/or current.

In theory you could write your own function to display a computed result, but as has been covered on other recent posts in the forum, this is not trivial and of the key pieces (knowing which window is being redrawn) is not currently publicly available. The downside of that approach anyway would be that it would then always annotate this information rather than you being able to configure the content of the labels.

So the best thing to do here would be to contact customer support to request an enhancement.

Regards,

Andrew.

okay understood. Thanks Andrew.