SPICE Run Control Parameters

You can specify HyperSpice’s simulation control parameters which will affect the simulation time, accuracy, and convergence characteristics.

Figure 1.

ABSTOL

Reset the absolute current error tolerance of the program.

Default: 1 Nano-ampere

CHGTOL

Resets the charge tolerance of the program.

Default: 1.0e-14

GMIN

Resets the value of GMIN, the minimum conductance allowed by the program.

Default: 1.0e-12

VNTOL

Sets the absolute voltage error tolerance of the program.

Default: 10 micro-volt

ITL4

Reset the transient analysis time-point iteration limit.

Deafult: 10

METHOD

Sets the numerical integration method used by SPICE. Possible name is TRAP (or Trapezoidal) or BE (or Backward-Euler).

Default: TRAP

RELTOL

Set the relative error tolerance of the program.

Default: 0.005(0.5%)

TRTOL

Set the transient error tolerance. This parameter is an estimate of the factor by which SPICE overestimates the actual truncation error.

Default: 7.0

Simulation Temperature (C)

Sets the temperature of simulation.

Default: 25 (C)