hello all so i made this layout of the pmos lvt device with

Question

hello all so i made this layout of the pmos lvt device with W=1um L=0 35um NF=16 M=6 and i m trying to do LVS but i get this result when i try to run it can anyone help me Note for the layout of the PMOS i pulled the device from the devices1 menu and just connected all the drains with all the gates making it diode connected through metal1 and all the sources together through metal2

Tim Edwards · Answer

What do the netlists look like And how did you invoke netgen on the command line

mohamed hassan · Answer

PMOS2 spice is the spice generated from Magic and PMOS tb spice is the spice generated from xschem

Mitch Bailey · Answer

Try ```netgen batch lvs PMOS2 spice PMOS2 pmos tb spice pmos tb openpdk share pdk sky130A libs tech netgen sky130A setup tcl``` The second parameter in the netlist specification is the cell name to compare Your extracted netlist has capacitors which probably aren t needed for LVS What commands did you use to extract the layout

mohamed hassan · Answer

I did extract all then ext2spice lvs then ext2spice

Mitch Bailey · Answer

Before `extract all` can you do ```extract no all extract do local``` `extract no all` turns off all the extraction options

mohamed hassan · Answer

will try now

mohamed hassan · Answer

So I don t do extract all or i do it after extract do local

mohamed hassan · Answer

I tried both and same problem

mohamed hassan · Answer

here s the spice file now

Mitch Bailey · Answer

Great No more capacitances in the extracted layout Do you get the same LVS results with the command I suggested

mohamed hassan · Answer

yes here s what i get when i type the Netgen command netgen batch lvs PMOS2 spice pmos tb spice openpdk share pdk sky130A libs tech netgen sky130A setup tcl Netgen 1 5 242 compiled on Sun Dec 11 23 39 33 EET 2022 Warning netgen command format use fully qualified name netgen format Warning netgen command global use fully qualified name netgen global Reading netlist file PMOS2 spice Call to undefined subcircuit sky130 fd pr pfet 01v8 lvt Creating placeholder cell definition Reading netlist file pmos tb spice Reading setup file openpdk share pdk sky130A libs tech netgen sky130A setup tcl No property as found for device sky130 fd pr pfet 01v8 lvt No property ad found for device sky130 fd pr pfet 01v8 lvt No property ps found for device sky130 fd pr pfet 01v8 lvt No property pd found for device sky130 fd pr pfet 01v8 lvt Model sky130 fd pr pfet 01v8 lvt pin 1 == 3 No property mult found for device sky130 fd pr pfet 01v8 lvt No property sa found for device sky130 fd pr pfet 01v8 lvt No property sb found for device sky130 fd pr pfet 01v8 lvt No property sd found for device sky130 fd pr pfet 01v8 lvt No property nf found for device sky130 fd pr pfet 01v8 lvt No property nrd found for device sky130 fd pr pfet 01v8 lvt No property nrs found for device sky130 fd pr pfet 01v8 lvt No property area found for device sky130 fd pr pfet 01v8 lvt No property perim found for device sky130 fd pr pfet 01v8 lvt No property topography found for device sky130 fd pr pfet 01v8 lvt No such pin 1 in model sky130 fd pr pfet 01v8 lvt Unable to permute model sky130 fd pr pfet 01v8 lvt pins 1 3 No property as found for device sky130 fd pr pfet 01v8 lvt No property ad found for device sky130 fd pr pfet 01v8 lvt No property ps found for device sky130 fd pr pfet 01v8 lvt No property pd found for device sky130 fd pr pfet 01v8 lvt No property mult found for device sky130 fd pr pfet 01v8 lvt No property sa found for device sky130 fd pr pfet 01v8 lvt No property sb found for device sky130 fd pr pfet 01v8 lvt No property sd found for device sky130 fd pr pfet 01v8 lvt No property nrd found for device sky130 fd pr pfet 01v8 lvt No property nrs found for device sky130 fd pr pfet 01v8 lvt No property area found for device sky130 fd pr pfet 01v8 lvt No property perim found for device sky130 fd pr pfet 01v8 lvt No property topography found for device sky130 fd pr pfet 01v8 lvt Comparison output logged to file comp out Logging to file comp out enabled Contents of circuit 1 Circuit PMOS2 spice Circuit PMOS2 spice contains 0 device instances Circuit contains 0 nets Contents of circuit 2 Circuit pmos tb spice Circuit pmos tb spice contains 0 device instances Circuit contains 0 nets Circuit PMOS2 spice contains no devices Final result Verify cell pmos tb spice has no elements and or nodes Not checked Logging to file comp out disabled LVS Done

Mitch Bailey · Answer

You re not using the command I suggested ```netgen batch lvs PMOS2 spice PMOS2 pmos tb spice pmos tb openpdk share pdk sky130A libs tech netgen sky130A setup tcl```

mohamed hassan · Answer

and here s what i get when i type the command you suggested netgen batch lvs PMOS2 spice pmos tb pmos tb spice PMOS2 openpdk share pdk sky130A libs tech netgen sky130A setup tcl Netgen 1 5 242 compiled on Sun Dec 11 23 39 33 EET 2022 Warning netgen command format use fully qualified name netgen format Warning netgen command global use fully qualified name netgen global Reading netlist file PMOS2 spice Call to undefined subcircuit sky130 fd pr pfet 01v8 lvt Creating placeholder cell definition Reading netlist file pmos tb spice Cannot find cell pmos tb in file PMOS2 spice

Mitch Bailey · Answer

`pmos tb spice PMOS2` should be `pmos tb spice pmos tb`

Mitch Bailey · Answer

`PMOS2 spice pmos tb` should be `PMOS2 spice PMOS2`

mohamed hassan · Answer

here s what i got now netgen batch lvs PMOS2 spice PMOS2 pmos tb spice pmos tb openpdk share pdk sky130A libs tech netgen sky130A setup tcl Netgen 1 5 242 compiled on Sun Dec 11 23 39 33 EET 2022 Warning netgen command format use fully qualified name netgen format Warning netgen command global use fully qualified name netgen global Reading netlist file PMOS2 spice Call to undefined subcircuit sky130 fd pr pfet 01v8 lvt Creating placeholder cell definition Reading netlist file pmos tb spice Reading setup file openpdk share pdk sky130A libs tech netgen sky130A setup tcl No property as found for device sky130 fd pr pfet 01v8 lvt No property ad found for device sky130 fd pr pfet 01v8 lvt No property ps found for device sky130 fd pr pfet 01v8 lvt No property pd found for device sky130 fd pr pfet 01v8 lvt Model sky130 fd pr pfet 01v8 lvt pin 1 == 3 No property mult found for device sky130 fd pr pfet 01v8 lvt No property sa found for device sky130 fd pr pfet 01v8 lvt No property sb found for device sky130 fd pr pfet 01v8 lvt No property sd found for device sky130 fd pr pfet 01v8 lvt No property nf found for device sky130 fd pr pfet 01v8 lvt No property nrd found for device sky130 fd pr pfet 01v8 lvt No property nrs found for device sky130 fd pr pfet 01v8 lvt No property area found for device sky130 fd pr pfet 01v8 lvt No property perim found for device sky130 fd pr pfet 01v8 lvt No property topography found for device sky130 fd pr pfet 01v8 lvt No such pin 1 in model sky130 fd pr pfet 01v8 lvt Unable to permute model sky130 fd pr pfet 01v8 lvt pins 1 3 No property as found for device sky130 fd pr pfet 01v8 lvt No property ad found for device sky130 fd pr pfet 01v8 lvt No property ps found for device sky130 fd pr pfet 01v8 lvt No property pd found for device sky130 fd pr pfet 01v8 lvt No property mult found for device sky130 fd pr pfet 01v8 lvt No property sa found for device sky130 fd pr pfet 01v8 lvt No property sb found for device sky130 fd pr pfet 01v8 lvt No property sd found for device sky130 fd pr pfet 01v8 lvt No property nrd found for device sky130 fd pr pfet 01v8 lvt No property nrs found for device sky130 fd pr pfet 01v8 lvt No property area found for device sky130 fd pr pfet 01v8 lvt No property perim found for device sky130 fd pr pfet 01v8 lvt No property topography found for device sky130 fd pr pfet 01v8 lvt Comparison output logged to file comp out Logging to file comp out enabled Contents of circuit 1 Circuit sky130 fd pr pfet 01v8 lvt Circuit sky130 fd pr pfet 01v8 lvt contains 0 device instances Circuit contains 0 nets Contents of circuit 2 Circuit sky130 fd pr pfet 01v8 lvt Circuit sky130 fd pr pfet 01v8 lvt contains 0 device instances Circuit contains 0 nets and 4 disconnected pins Circuit sky130 fd pr pfet 01v8 lvt contains no devices Contents of circuit 1 Circuit PMOS2 Circuit PMOS2 contains 96 device instances Class sky130 fd pr pfet 01v8 lvt instances 96 Circuit contains 386 nets Contents of circuit 2 Circuit pmos tb Circuit pmos tb contains 1 device instances Class sky130 fd pr pfet 01v8 lvt instances 1 Circuit contains 6 nets Circuit was modified by parallel series device merging New circuit summary Contents of circuit 1 Circuit PMOS2 Circuit PMOS2 contains 1 device instances Class sky130 fd pr pfet 01v8 lvt instances 1 Circuit contains 386 nets Contents of circuit 2 Circuit pmos tb Circuit pmos tb contains 1 device instances Class sky130 fd pr pfet 01v8 lvt instances 1 Circuit contains 6 nets Circuit 1 contains 1 devices Circuit 2 contains 1 devices Circuit 1 contains 6 nets Circuit 2 contains 6 nets Final result Netlists do not match Logging to file comp out disabled LVS Done

mohamed hassan · Answer

how do i know why they re not matched

Mitch Bailey · Answer

Progress Take a look at `comp out`

mohamed hassan · Answer

Perfect thanks so much

mohamed hassan · Answer

< Mitch Bailey> after many hours of debugging i found out that the reason they didn t match is that xschem extracts the device for example called M0 but Magic extracts it X0 and once i edited the netlists and made them both M0 LVS matched any idea how i can fix this issue in Magic

Mitch Bailey · Answer

Before creating the netlists from xschem be sure to check `Simulation gt LVS netlist Top level is a subckt`

Mitch Bailey · Answer

Also the mos devices should have the `spiceprefix=X` property

mohamed hassan · Answer

oh great thanks for the info