Trapezoidal Rule

The trapezoidal rule is the Nexxim circuit simulator’s default method for transient analysis.

The trapezoidal rule is an accurate integration method that does not produce numerical damping. It can produce “trapezoidal ringing,” an oscillation in calculated values that is not the true circuit behavior. If ringing is observed, switch to BDF2 or NDF2.

See Transient Analysis Method Option RF in the Nexxim Design Examples help topic for an example of trapezoidal ringing and the use of the NDF2 integration method.