LVS using L2N files

Comments

• Matthias

  September 19

  Can you provide a simple sample? You can attach .zip archives to this forum's discussions.

  Matthias
• Tushar_Mayank

  September 24

  Hi Matthias,
  I am sharing the L2N files: orio.l2n (the original file) and short.l2n (with short and open circuits).
  Since we can't share the layout, the goal is to compare these two files to find the differences, similar to a net-check on the package level. Right now, I am using a custom Ruby script. Since I don't have a schematic, is there a way to use KLayout's LVS script directly to generate a comparison report by reading two L2N files from two different layouts?

  l2n.zip 32.4K
• Matthias

  October 2

  Hi @Tushar_Mayank,

  thanks for the samples. A script that compares them is this:

  sch1 = RBA::Netlist::new
  sch1.read("orio.sp", RBA::NetlistSpiceReader::new)
  
  sch2 = RBA::Netlist::new
  sch2.read("short.sp", RBA::NetlistSpiceReader::new)
  
  comparer = RBA::NetlistComparer::new
  res = comparer.compare(sch1, sch2)
  
  puts "Result: #{res}"
  

  However, your samples do not contain any comparable information. Those are two empty subcircuits.

  For a meaningful comparison you need devices and circuits. Packages alone can't be compared as they only have pins. In your case you seem to have extracted a package without creating top level pins, so you don't even have nets (Spice needs at least one pin, subcircuit pin or device terminal to form a net).

  Matthias