Feature List

SimOne includes the Capture schematic editor, which performs all tasks associated with schematic reading and editing, component selection, and simulation control. The simulation engine is a software module that runs simulation operations, controls the display of results and provides options for data post-processing.

The following circuit analyses are available in SimOne:

1. DC analysis
   Includes operating point calculation and  direct current transfer functions determination. A selection of methods is available for solving nonlinear algebraic equations: Newton–Raphson, Damped Newton–Raphson, Gmin Stepping, Junction Gmin Stepping, Source Stepping.
2. AC analysis
   Calculates and displays the circuit’s frequency characteristics, including Nyquist plot.
3. Transient analysis
   Uses an original method for integrating differential algebraic equations. This method has enhanced precision and stability compared to the methods used in  SPICE simulation.
   Calculations that use traditional SPICE simulation methods — Gear, trapezoidal, Euler — are performed by the code matrix processor, which speeds up processing considerably.
4. PSS analysis
   Periodic behavior of the circuit is calculated using the Shooting Newton method while maintaining a matrix-free approach: no sensitivity matrix is created explicitly. Systems of linear equations are solved using the GMRES iterative Krylov subspace method.
5. Temperature sweep (.TEMP)
   Models the behavior of the circuit under variation of operating temperature.
6. Parameter sweep (.PARAM)
   Models the behavior of the circuit under variation of parameters  of input signals and component models.
7. Stability analysis
   Two independent options are available for analyzing the circuit stability in the neighborhood of the operating point: using circuit’s eigenfrequencies or Mikhailov criterion. The result of the analysis is an estimation of the circuit’s stability, a plotted Mikhailov hodograph and a table of the circuit’s eigenfrequencies. You can also plot a partial Mikhailov hodograph for a specified frequency range and estimate stability yourself.