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# SIMULATION

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- In XSCHEM a schematic usually contains all the details needed to run a simulation.
- When a schematic is correctly drawn just generate the netlist pushing the Netlist button, and then start simulation by pressing the Simulate button.
- XSCHEM has bindings to waveform viewers as well as simulators. Press the Waves button after simulation is completed to view the results.

  TOOL | TYPE | XSCHEM SUPPORT
  --- | --- | ---
  ngspice | Simulator | Works
  Xyce | Parallel Simulator | Works
  Icarus Verilog | Simulator | Works
  GHDL | Simulator | Works
  ModelSim | Proprietary Simulator | Works
  NcSim | Proprietary Simulator | Works

  TOOL | TYPE | XSCHEM SUPPORT
  --- | --- | ---
  Hspice | Proprietary Simulator | Works
  Finesim | Proprietary Simulator | Works
  Gtkwave | Viewer | Works
  Gaw | Viewer | Works
  Waveview | Proprietary Viewer | Works

- With proper netlisting attributes on leaf cells the same design can be simulated unchanged in Spice, Verilog, VHDL.
- DC Operating point information back-annotation into the schematic is possible.