4.3.4 Junction Field-Effect Transistor

Subcircuit reference for JFET.

Valid values for selector are: Spice, SpiceDC, SpiceAC, and SpiceNoise. Possible parameters are described below.

Large-Signal Model

The analog behavioral model included in the Analog Insydes model library has the following port characteristics:

where G denotes the Gate, D the Drain, and S the Source, respectively. The port currents can be expressed in the port variables as follows:

Equivalent schematic for the DC and transient analysis

The large-signal model includes the following model parameters:

DC related model parameters.

Parasitic resistance related model parameters.

Capacitance related model parameters.

Temperature related model parameters.

Noise related model parameters.

Miscellaneous model parameters.

The automatic reduction of the model complexity controlled via the global Analog Insydes option ModelLibrary influences the following parameters:

Simplification related model parameters.

Small-Signal Model

Equivalent schematic for the AC analysis

The small-signal model includes the following model parameters:

Small-signal model parameters.

The automatic reduction of the model complexity controlled via the global Analog Insydes option ModelLibrary influences the following parameters:

Simplification related model parameters.