Spectre is a SPICE-class circuit simulator owned and distributed by the software company Cadence Design Systems.
It provides the basic SPICE analyses and component models.
Spectre comes in enhanced versions that also support RF simulation (SpectreRF) and mixed-signal simulation (AMS Designer).
The netlist formats, behavioral modeling languages, parasitic netlist formats, and stimulus files are common across the Spectre Simulation Platform.
Supported formats include: Spectre was developed at Cadence Design Systems by Ken Kundert and Jacob K. White.