Hello again all,
Vital stats: version: ADS2003A
OS: Solaris 8 (Win2k available)
Okay, so my double octagonal spiral transformer macro is working and I've created a layout component. So far so good. Here's the thing: because I'm doing pseudo-3D analysis, I've got ports that are right on top of each other (they're on different layers). This means that I can't assure connectivity to my satisfaction using the standard layout look-alike schematic symbol. So, instead, I'm using the black box symbol. The thing is the automated port placement is rather annoying. See, I set the ports up to go 1--5 and then go around again on different layers for 6--10, where 6 matches 1, 7 matches 2, etc. The default symbol port layout just goes 1--10 in order counter-clockwise around the symbol starting near the upper-left corner. Now what I'd like to do is match the ports up properly and even put them into positions that resemble their real positions on the layout, so the symbol would be more like the layout look-alike I can't use but wish I could . I haven't had any luck editing the symbol, however. Is there a way to do this with layout component symbols? I've successfully drawn what I want, but I don't know how to link it to the component. It seems unwilling to take it. Ideas? RTFMs (preferably with section names/numbers)?
Thanks in advance for your help,
vgreer
Vital stats: version: ADS2003A
OS: Solaris 8 (Win2k available)
Okay, so my double octagonal spiral transformer macro is working and I've created a layout component. So far so good. Here's the thing: because I'm doing pseudo-3D analysis, I've got ports that are right on top of each other (they're on different layers). This means that I can't assure connectivity to my satisfaction using the standard layout look-alike schematic symbol. So, instead, I'm using the black box symbol. The thing is the automated port placement is rather annoying. See, I set the ports up to go 1--5 and then go around again on different layers for 6--10, where 6 matches 1, 7 matches 2, etc. The default symbol port layout just goes 1--10 in order counter-clockwise around the symbol starting near the upper-left corner. Now what I'd like to do is match the ports up properly and even put them into positions that resemble their real positions on the layout, so the symbol would be more like the layout look-alike I can't use but wish I could . I haven't had any luck editing the symbol, however. Is there a way to do this with layout component symbols? I've successfully drawn what I want, but I don't know how to link it to the component. It seems unwilling to take it. Ideas? RTFMs (preferably with section names/numbers)?
Thanks in advance for your help,
vgreer
I have also encountered this "issue". But I have some good news for you!
Not only can you modify the symbol (black box or layout lookalike), but you can just modify the Layout Lookalike symbol that is created using the "Momentum>Component>Create/update" menu.
Here are the steps (from the beginning):
1.) Create/update the layout lookalike symbol for your layout component by selecting the appropriate option in the "Momentum>Component>Create/update" menu.
2.) Once the symbol has been successfuly created/updated, make sure that the design is saved.
3.) Now, open the schematic view for your layout component by selecting the "Window>Schematic" menu from the layout.
4.) When the schematic window opens, you will see nothing. To see the symbol, select the "View>Create/Edit Schematic Symbol..." menu.
5.) Now, you will see the actual layout lookalike symbol. At this point, you can move the port symbols (pins) to any location you desire. To see which is which, just double-click on the pins (blue squares). This will not cause any problems with the model, since this is just the symbol.
6.) This will allow you to move the overlapping pins to any location you desire!
7.) You can do this with either the lookalike or blackbox symbols.
8.) If you are unable to move or edit any objects in the symbol view, just make sure that the layer(s) that it is on is selectable (click on the "Options>Layers..." menu in the schematic symbol view and verify the editing properties).
9.) Once you are happy with the symbol, save the design and then place a new instance of your layout component into a new schematic design. You will see your modified symbol appear!
An example of this is shown in the Momentum Seminar Archive. The entire archive can be viewed at this webpage:
http://eesof.tm.agilent.com/applications/momentum_seminar.html
The specific portion of the material that discusses this issue can be found on pages 25-30 of the section entitled "Advanced Topics (Part 1, continued), Thick Conductor Simulations (2 of 2), Coupled Lines Example". This specific document can be viewed by clicking the following link:
http://eesof.tm.agilent.com/pdf/momentum_03_03.pdf
Note that this example shows how you can modify the symbol after the layout component has already been placed.
I hope that this helps!
Keefe