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Hi
This happened often in astro.Because its DRC module is not very good and there are some DRC rules not in your lib.
Do not believe the DRC result of astro,calibre can do it better.
flyankh
About Virtuoso
Hi
layout.cdb is the main data of your layout ,the layout.cd% is your backup layout file,the other 2 files ,I don't know about them too^^
flyankh
Timing closure doubt
Hi
I will fix hold violation first.because it is easy to fix.And I think the setup violation is easy to fix on frontend but difficult to backend.So let the setup violation be there if the design is not small.
Above all ,setup violation makes us to decrease the freq,but...
port type table is not defined
Hi
I stream in a gds file into milkyway lib,and when I do BPV ,I get the error as "ERROR : port type table is not defined",have anybody seen it ?And how to solve this problem?
Thanks in advance!
Flyankh
Hi
I think your fullchip floorplan can be decided till the pad location is given .Because the power is from power pad:)
You can make a ring around digital part and another around analog part ,but it maybe use more area in your chip.The ring around analog part sometimes can be canceled and you...
hi
I don't understand your case,for I haven't seen any standard cells working at 2 or more voltage on the same time in one chip.Or your means that the digital part's voltage is different to the analog part?
Regards
flyankh
Tri-mode issue
Hi ,all
I used tri-mode gates in my design,but after I synthesis the RTL code ,it give me a netlist which contain a net type "tri",and there are some instances named "tran",in fact there didn't have a standard-cell with same name.
For example:
There have one "tri" net named...
CAPACITOR LAYOUT
Hi,sowmya
At first,I am sorry to misunderstand you questions:P
In fact,the MiM caps' structure is contains three parts .For example , the M3-M4 caps have the lower plate M3,and the dielectric material is normal process material between M3-M4,BUT the UPPER plate is very...
CAPACITOR LAYOUT
ok,the point is symmetry ,including the device self,the devices between eath other ,the connecting metal,even the dummy...and at the same time ,don't forget the crossing match ways.Use your heart and an artwork will apear in your hand at last.
Regards
flyankh
primetime manual
Hi all
I am trying to do sth. about PrimeTime,but I found the manual build in PrimeTime is too brief and I can't get more help from it.I think somebdy here maybe have it,so do me a favor,please~~
Thanks in advance
Best regards
flyankh
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