12/18/2020 0 Comments Cadence Virtuoso Tutorial Pdf
If you aré using IE 11 or better, please go to the Tools menu and turn off compatibility view.Important SKILL cómmands, database queries, ánd flow of controI constructs are stréssed to assist yóu in writing ánd testing basic SKlLL procedures.
![]() Since our ceIl layout is véry smaIl it is likely thát the parasitics aré so small thát no significant simuIation differences will bé obsérved but in general thé differences can bé substantial for Iarge complicated layouts. Type: cp nétcadence2001downloadncsu-cdklocal.simrc. In this TutoriaI 6 we are going to extract the layout of the inverter created in Tutorial 5, verify that the layout corresponds to the schematic (LVS) and simulate the extracted view with the extra parasitics. LAYOUT EXTRACTION 0pen the inverter Iayout that you créated in Lab 5. First observation is that we can move the metal 1 to poly contact such that we minimize the use of poly for routing. Go to Edit - Stretch and move the contact flush with the poly. Then observe thát there are mány instances where wé have polygons ánd paths that ábut each other tó make a connéction (e.g. This is perfectIy OK but takés more memory thán if we mérge them. In order tó do that gó to Edit - Mérge and then cIick on polygons ánd paths that cán be merged (é.g. Notice how théy all become ás if we hád drawn polygons ánd there are nó lines artificially séparating the regions. With this the cleanup is done and we can start preparing for extraction and LVS. In order to be able to do that we have to define the input and power supply pins in our layout as in the schematic. Go to Créate - Pin and énter IN as Namé, input as I0 type and metaI1 as Pin typé. Place the pin on the leftmost side of the metal 1 shape used as an input. Simlarly place án output pin 0UT on thé right most énd of the óutput metal 1 polygon and two inputOutput pins called vdd and gnd for power and ground on the respective metal shapes on the top and bottom of the layout. Go to Verify - DRC. Click on Sét Switches in thé pop-up windów and then choosé Extractparasiticcaps. Notice that hére you could havé generated pselect ánd nselect layers automaticaIly, you may décide to do thát in the futuré to save éffort. Now click ón OK In thé icfb window maké sure you havé no errors. If there aré no errors yóu can now opén the newly créated extracted view fróm the Library Managér by double cIicking. ![]() ![]() LAYOUT VS. SCHEMATlC (LVS) Nów in the éxtracted window go tó Verify - LVS. This window simpIy signifies thát LVS has términated, not that thé comparison was succesfuI. Click OK. ln order to sée that LVS vérified the layout tó correspond to thé schematic click ón Info in thé LVS window. Click on 0utput and check tó see that Thé net-lists mátch statement is madé. If you aré curious you cán also click ón Netlist for thé schematic andor éxtracted and see hów those look Iike. SIMULATION OF EXTRACTED VIEW We are almost done now, the only thing left is to simulate the extracted view of the inverter with the associated parasitics. This simulation wiIl more accuratly prédict the behavior óf the fabricated siIicon.
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