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Junction Diodes

General Form:
dname n+ n- modname [parameters ...]

Parameter Name Description
off Device is initially nonconducting, for circuit convergence assistance.
ic=vj The initial junction voltage (initial condition) for transient analysis.
area=val Scale factor that multiplies all currents and other values, effectively modifying the diode area.
m=val Device multiplicity factor, similar to area.
pj=val Perimeter scale factor for sidewell.
temp=val Device operating temperature, degrees celsius.
dtemp=val Device operating temperature difference from circuit operating temperature. This is overruled if temp is also given.

Examples:
dbridge 2 10 diode1
dclmp 3 7 dmod 3.0 ic=0.2

The n+ and n- are the positive and negative nodes, respectively. The parameter modname is the model name, area specifies the area factor, temp specifies the operating temperature, and off indicates an (optional) starting condition of the device for dc analysis. If the area factor is omitted, a value of 1.0 is assumed. The (optional) initial voltage specification using ic=vd is 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 transient initial conditions.


next up previous contents index
Next: Diode Model Up: Semiconductor Devices Previous: Semiconductor Devices   Contents   Index
Stephen R. Whiteley 2017-02-22