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cadence_faqs
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cadence_faqs [2021/11/03 22:02] (current) vsaxena |
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| **A.** No, you can only access it through an X-server client such as X2Go. | **A.** No, you can only access it through an X-server client such as X2Go. | ||
| + | ---- | ||
| ===== Virtuoso Schematic Editor FAQs===== | ===== Virtuoso Schematic Editor FAQs===== | ||
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| **A.** This issue arises when you click 'Never' when prompted for license checkout. A common rule when working with Cadence is 'Never click Never'. This option gets saved in a .cdsenv file in your home directory. To fix this issue, delete the .cdsenv file in your home directory (NOT in the local work directory). | **A.** This issue arises when you click 'Never' when prompted for license checkout. A common rule when working with Cadence is 'Never click Never'. This option gets saved in a .cdsenv file in your home directory. To fix this issue, delete the .cdsenv file in your home directory (NOT in the local work directory). | ||
| ---- | ---- | ||
| + | **Q.** How do I Add a library so that it shows up in my Library Manager? | ||
| + | |||
| + | **A.** In your project directory, open the cds.lib file. Then if you need to add the library /path/.../NewLibrary, then add a new line to the cds.lib | ||
| + | |||
| + | <code>DEFINE NewLibrary /path/.../NewLibrary</code> | ||
| + | |||
| + | Then, in the Library Manager, click View-> Refresh. You should be able to see the NewLibrary added your library. | ||
| + | ---- | ||
| + | **Q.** How do I make a copy of a library or a cell? | ||
| + | |||
| + | **A.** In the Library Manager, select a library (or cell) and then Right Click and select Copy option. Then you can define the location of the new library (or cell). | ||
| + | |||
| + | If you are copying library or a hierarchical cell, then its a good idea to update instances of the entire library, so that your schematic uses local copied cells instead of pointing all the time to the original directory. | ||
| + | |||
| + | {{:wiki:copy_lib.png?600|}} | ||
| + | -------- | ||
| + | |||
| **Q.** How do I convert Cadence Virtuoso Layout to an image file? | **Q.** How do I convert Cadence Virtuoso Layout to an image file? | ||
| - | **A.** [[http://www.mbeckler.org/cadence_plot/|Link]]. | + | **A.** Follow the [[http://www.mbeckler.org/cadence_plot/|Link]]. |
| + | ---- | ||
| ===== Virtuoso Layout Editor FAQs===== | ===== Virtuoso Layout Editor FAQs===== | ||
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| **Q.** How do I get rid of **layout grid errors** when I perform DRC on my layout? | **Q.** How do I get rid of **layout grid errors** when I perform DRC on my layout? | ||
| - | **A.** Make sure your major and Minor spacings in layout are multiple of the grid lambda. Lets say for 0.5u process the lambda=0.3u, then you change change the minor spacings to 0.9 and major to 4.5. The grid snap spacing can be 0.15. | + | **A.** Make sure your major and Minor spacings in layout are multiple of the grid lambda (λ). For 0.18um CMOS process the λ=0.09u. You can access the display options by the keystroke/bindkey “e.” The grid is set to a snap spacing λ/2 (=45nm) in the layout tool. Here, you can set the minor spacing to 2λ (=0.18μm) and major spacing to 10λ (=0.90μm). You should try to size your devices in the integer multiples of λ and place them on the grid to later avoid grid errors. |
| ---- | ---- | ||
| **Q.** LVS for my extracted layout doesn't work, and shows error in si.log "Diva cannot fine switch master cell .... for instance from viewlist." | **Q.** LVS for my extracted layout doesn't work, and shows error in si.log "Diva cannot fine switch master cell .... for instance from viewlist." | ||
cadence_faqs.1601960866.txt.gz · Last modified: 2020/10/06 05:07 by vsaxena
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