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Junction Field-Effect Transistors (JFETs)

General Form:
jname nd ng ns modname [parameters ...]

Parameter Name Description
off Device is initially nonconducting, for circuit convergence assistance.
area=val Scale factor that multiplies all currents and other values, effectively modifying the JFET area.
ic=vds,vgs The initial voltages (initial condition) for transient analysis.
icvds=vds The initial vds (initial condition) for transient analysis.
icvgs=vgs The initial vgs (initial condition) for transient analysis.
temp=val Device operating temperature, degrees celsius.

Examples:
j1 7 2 3 jm1 off
j43 10 4 1 jmod2 area=2

The nd, ng, and ns are the drain, gate, and source nodes, respectively. The modname is the model name, area specifies the area factor, temp specifies the operating temperature, and off indicates an (optional) initial condition of the device for dc analysis. If the area factor is omitted, a value of 1.0 is assumed. The initial conditions specified using ic or alternatively icvds and icvgs are intended for use with the uic option in transient analysis, when a transient analysis is desired starting from other than the quiescent operating point. The .ic line provides another way to set initial conditions.


next up previous contents index
Next: JFET Models (both N Up: Semiconductor Devices Previous: BJT Models (both NPN   Contents   Index
Stephen R. Whiteley 2017-10-02