MOSFET GMIN Implementation

GMIN is a conductance added to all non-linear devices to improve DC convergence. For LEVEL 1-3 and LEVEL 17 MOSFETs, the default GMIN is implemented as shown below:

This is compatible with SPICE and earlier versions of SIMetrix.

For BSIM3 and BSIM4 devices, and also for LEVEL1-3 and LEVEL 17 devices if the NEWGMIN .OPTIONS setting is set, the GMIN implementation is:

OLDMOSGMIN is a .OPTIONS setting with the default value of zero. MOSGMIN is also a .OPTIONS setting with the default value of GMIN. Using the above configuration with OLDMOSGMIN =0 often converges faster especially if the Junction GMIN stepping algorithm is used.

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