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33 Threads found on edaboard.com: Drc Erc
Floating gates could already be found by schematic erc (Electrical Rules' Check). Floating poly and metal can be found by a layout drc. Here a few floating check lines from a former Assura (resp. Diva) drc file (also called "erc"): saveDerived( geomOutside( CPOL CCON ) "floating CPOL, # erc" ) saveDe
hi , here i had attached the schematic of eagle , it was giving error's when checking in erc. supply and output pins were mixed like that, can u any one solve this problem in this schematic thank you regards Rajesh
Hi all, Please can someone help me with assura to PVS conversion? So how can I convert drc, erc and lvs rule files from one tool to another? Thanks for your advices.
What did drc and erc show when you ran them? I suggest getting erc done before routing. 1) I don't understand why you are concerned about setting the grid in "relation" to trace width. Where did you get that advice? What rule are your following? 2) It is much easier to find errors, such as unconnected pins and pads, if you (...)
To run drc in pcb, select Tools->Design Rule Check
What is the difference between an erc error and a soft check error ? Why in LVS we have these two as different checks? erc is an independent check program, can be run on schematic already, i.e. long before layout, drc & LVS, hence usually is not included in the LVS set. It is a program which che
what is drc,LVS,erc?
Actually an erc error message (probably run simultaneously with drc). If you intended that VOB1 and VOB2 should be separate nets, the warning tells you that these nets are actually short-cut with VDD. So you should not ignore the warning. If you, however, have labeled the same node with 3 different labels, the warning just tells you that VD
Hi, Your prb is an erc and not a drc probkem.
Check this error message string in your Assura drc (or erc) rules' file. The rule violation generating this error message should give you a hint. I'd suspect that your substrate taps are connected to different nodes, which is not allowed.
Latchup rule LAT3 distance s/d diff pgate net_welltap > 20 drc/erc messages often are confusing, because you never know if they tell you the reason of an error, or what you should change. In your case, I guess the distance between the s/d region and the welltap is too far.
2 cents of info 1)first you design using pen and paper (no need of an foundry) 2) you do the simulation (you need the foundry models, deside your foundry now) 3) you do the layout (you need the Pcell and other foundry technology info) 4) do the LVS and drc, erc check (you need the foundry rules) 5) make the GDS file and send it to the foundry
First, this are drc errors. Have a look at your clearance luck, ep20k
Hello all. I have two lateral pnp transistors contained within one well. They are diode connected (i.e. the base and collectors are connected together). When I run ASSURA drc I get the following error: 2 bad_n_well_welltap_multconn_erc and the two base contacts of the lat 2 transistors are highlighted. I understand that Assura is tellin
can anyone tell :--- drc--design rule check-----i know the details.. erc---electrical rule check-----how it works?? these rules also given by foundry?? antenna drc----is it the antenna effect which comes into picture during fabrication process.......there are antenna rules given by i rht.. ESDdrc-----?? ESDNET-----?? (...)
there are interface between calibre and virtuoso,t that is means, u can get all the calibre' results information (drc, lvs, erc and attena errors). thanks.
actually, i faced this problem last month. you've to modify you hercules runset, following the userguide in hercules reference manual on drc/erc.. if you still have problem... you can mail me for the detail script modification...
the drc, erc, LVS, LPE etc.
there's any documents for design a personal library in IC cadence ??? How write a drc Rul, erc Rul, tech lib, generate a tf and lef lib and all component for a complete set of cells. thanks
Hy guys Which of these erc ( error rule checkers ) do you prefere for drc extraction of a layout. Anybody has experience with NANOSIM drc checker ( personaaly I've only experience with DRACULA drc). ? I mean for example if some of you have experience in checking a layout with nanosim and dracula and one off these (...)
yes, techfile and display.drf drc rule and LVS rule must have. after layout, you give gds to the foundry. and the foundry will give your a form, such as process, die size and so on need to provide.
hi, I think tapeout review is not focused on STA, but just focus on LVS/drc/erc. and of course check the gdsII mapping.
Recently i will use dracula for layout verification. Now i already have the drc/LVS/erc..files.The problem is how to get into the DRACULA enviroment? It is said that there is a command file for dracula like mydrc.com,but i didn't find it,of course i can't edit. Who can tell me where is it or how to create one? Another qu
Recently i will use dracula for layout verification. Now i already have the drc/LVS/erc..files.The problem is how to get into the DRACULA enviroment? It is said that there is a command file for dracula like mydrc.com,but i didn't find it,of course i can't edit. Who can tell me where is it or how to create one? (...)
I only have a brief view.... drc is design rule check while erc is electronic rule check. erc will check IR drop,antenna,EM(electronic migration) effect in your chip which will not be checked by traditional drc process.
At present they are promoting Assura. Other drc tools from cadence are Dracula and Diva
DIVA interactive drc, LVS, erc ... Assura : Batch mode drc, LVS, erc DIVA for small block verification Assura for big block or whole chip verification Assura is more expensive, of course
PDK is no thing but a seriesof script file like spice models for active/passive devices, drc, erc, Antenna rules and so on. to generate it u must have the files and write the others, and of cource it will ahve BUGS so the best way is to use provided pdk of your fab (even in this case u must update it since it have several bug fixes in each version
what is the difference between Diva and Dracula in ic5? They look all do drc and erc, then why need two? Have a good day!
Hi mikel262 A 'clearance constraint violation' means that you have tracks to near to other tracks or to near to pad's, via's or something similar. This constraint can be set to a value that will be checked by running the drc. Bye
The nomal processdure is to do P&R and do post simulation like timemill and powermill, if not suitable, yo should do it agagin, finaly, just before type out, a drc/erc/LVS checking on the final GDSII must be carried out
:?: the best is csmc0.6um cmos process for dracula who can share it with me ? thanks a lot
Besides the tools, another important thing is the design KITS. Libary from the same ASIC vendor must be used from simulation, synthesis, DFT, place route, LVS/drc/erc, and even transister simulation. It is difficult to find such a good design Kit that support all the tools. Who can provide a design kit? It is more difficult to find a KITS