Turning on Spectre Parasitic Reduction

If you are using the AMS Designer simulator with the Spectre solver, you can turn on parasitic reduction for designs that have RC parasitics.

To do this:

• Use the -spectre_args command-line option to xrun to specify the Spectre +parasitics command-line argument as follows:
  xrun -spectre_args +parasitics[= N | rf ] ...
  Here, the value specified for the +parasitics argument represents the maximum frequency (in GHz) of interest for RC reduction. If the chosen value is less than the maximum operating frequency of interest, you may experience accuracy loss for frequencies higher than the specified value.
  • N represents the user-defined maximum frequency
  • rf represents the maximum frequency of 30 GHz
  • If no value is specified for the +parasitics argument, the maximum frequency of 1 GHz is applied by default