Powersim is excited to announce that it has been acquired by Altair.


Simple Interface

Capable of supporting VHDL or Verilog code for FPGA implementation

Easy design validation and debugging in simulation environment


  • ModCoupler-VHDL in version PSIM 2020a is compatible with Questa Core 10.0 (64-bit only).
  • Modcoupler-VHDL needs the FLI (foreign language interface) feature to communicate with ModelSim. Nowadays, FLI is a pay-only feature, available only in Questa Core.
  • Modcoupler-VHDL does not work with ModelSim-Altera nor any other free Modelsim variant.


  • ModCoupler-Verilog in version PSIM 2020a is compatible with all versions of ModelSim (64-bit only).
  • Modcoupler-Verilog works with any Modelsim or QuestaSim version. The required feature (VPI) is part of the Verilog standard, so any simulator must support it.