Custom IC Design - All Comments

You're absolutely ri ...

Anonymous — Thu, 11 Mar 2010 04:52:15 GMT

You're absolutely right, Mark. Thanks for the comment. I was going to mention this in the article, but decided I didn't want to confuse things for anyone who might not be aware of that old "trick". The new way is much more straightforward. I also wanted to add that dependent expressions work in ADE XL as well.

BTW, another new feature in ADE in IC 6.1.4 is the ability to drag-'n-drop to reorder the rows in the Outputs, Variables and Analysis subwindows. Dependent expressions don't depend on the order of definition, but being able to rearrange the rows does make things easier to read. Also, reordering the analyses redefines the order in which the analyses are run.

I would point out th ...

MarkSummers — Thu, 11 Mar 2010 01:53:17 GMT

I would point out that this is available in past releases. However there are some caveats. You have to use the following syntax in the expression. Y = 2 and X = 2. Then you can use Z = X + Y. The order matters and the equal signs in the output expression make the expression a skill expression. However it does work. Not having to worry about the order with the new version is a very good thing, since changing the order of expressions in the ADE window is not simple. Thanks for the info

Note that in IC 614 ...

Anonymous — Sat, 06 Mar 2010 16:16:17 GMT

Note that in IC 614 when you save from Virtuoso Tools such as VSE or VLS, a thumbnail is automatically generated for you, or updated to reflect the latest save you have made...

And don't worry... Your favorite DM system will recognize these extra little files... we remembered to update the registry files !

Probably not somethi ...

Anonymous — Sat, 06 Mar 2010 16:04:29 GMT

Probably not something you want to do for long... but if you want to see all the option form for all the commands... you can set the system to always display the option form when you start any command... Go to the CIW and set your options to display the enter function optio n form at the start of every command...

Remember to turn it off once you have had your full of these... :-)

Prakash, I'm not su ...

Anonymous — Thu, 04 Mar 2010 06:50:16 GMT

Prakash,

I'm not sure I understand your question, but I suspect you will need to make sure you are using the appropriate library for the version of IC61 you are using as well as the correct one for your PDK.

I hope that helps,

Stacy

s its very intresti ...

reddymsrsas — Fri, 26 Feb 2010 22:03:50 GMT

s its very intresting

Dear sir, am using I ...

reddymsrsas — Fri, 26 Feb 2010 20:03:07 GMT

Dear sir, am using IC 6.1. now,for this when we r drawing a layout for inverter , for pmos transistor we want to add bulk ,where i have to get it that one,Before in Ic 5.1 version ,all ties and vias we are taking form gpdk ,or in layout window we are selecting o(object) in key board and we select which object we want, but in now ic 6.1 we didnt have that option ,so any other way to select that ,or whether my library is wrong,

please replay me,

with regards,

Prakash

Sorry for the delay ...

Anonymous — Tue, 02 Feb 2010 11:36:14 GMT

Sorry for the delay in answering. Right now, the ADE GUI doesn't really have any "bindkeys" as such. In IC 6.1, you do have the ability to do Ctrl-X, Ctrl-C and Ctrl-V in the Design Variables area of the main ADE GUI to edit variable values directly without bringing up an extra window.

Also, as in all of Virtuoso in IC 6.1, menu access is enabled with the Alt key. Those are the underlined letters in the menu (and sub-menu) headers. So, in ADE, for example, Alt-S-A would do Netlist and Run.

Given that, are there any other sorts of things you think would be useful to have as ADE bindkeys?

Thanks for the comment!

Stacy

Don't worry about it ...

Anonymous — Tue, 02 Feb 2010 06:30:51 GMT

Don't worry about it Kunai. The tools that convert the layout data to e-beam data can invert your data with a simple command; it is always done this way. If you must invert it first, you can always use a NOT Boolean in any DRC tool.

Hi Stacy, I am wonde ...

Anonymous — Thu, 28 Jan 2010 17:57:48 GMT

Hi Stacy, I am wondering if ADE had any keyboard shortcuts ... if its on the "Things You Didn't Know" list, please post about it.

Thank you.

Dear Sir, how do i ...

Anonymous — Tue, 26 Jan 2010 02:09:47 GMT

Dear Sir,

how do i invert a mask in cadence virtuoso? i.e. convert a bright field mask to dark field and vice versa. I need this since i need to expose the remaining region of the layout in e-beam lithography tool using a positive photo resist (PMMA).

You're absolutely ri ...

stacyw — Thu, 17 Dec 2009 18:42:47 GMT

You're absolutely right! Thanks for helping out. This will work out of the box for most users for notes, pin names and wire labels, which is very handy. And as you mentioned, do Edit->Select->Filter (or Ctrl-F) to make instance objects selectable and then you can directly edit instance properties.

Also Schematic text ...

skillUser — Thu, 17 Dec 2009 16:24:25 GMT

Also Schematic text editing mode can be initiated by double-clicking left on a selectable label, though you may have to have previously set the Schematic Selection Filter (Ctrl-F) to allow labels to be selectable. Once you have double-clicked on an item you can edit it, hit Return to accept the change and as noted, exit the Text mode by pressing the Escape key.

Hmmm. What version ...

Anonymous — Wed, 09 Dec 2009 16:52:08 GMT

Hmmm. What version of Virtuoso are you using? I tried this in IC 6.1.3 ISR15 and it seems to work fine. It may have been an problem in earlier ISR's. If it isn't working for you in a recent version, go ahead and contact customer support.

Thanks!

When I use the VAR(" ...

Anonymous — Wed, 09 Dec 2009 07:08:20 GMT

When I use the VAR("stopTime") syntax for the stop time, the value of the design variable "stopTime" must numerical.

For example:

---------------------------------------

stopTime = 2u

=> WORKS FINE

---------------------------------------

setupTime = 20n

samplePeriod = 30n

noSamples=40

stopTime=setupTime+samplePeriod*noSamples

=> GIVES ERROR: "Unknown parameter name 'nil' found in expression"

---------------------------------------

Any workarounds?