SIMPLORER User Manual V6.0 - FER-a

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5
108 Modeling with Circuit Components
Dialog Settings
� «Characteristic Type»
The diode type of predefined characteristics is selected. In the list, select a characteristic.
� «Type»
In the list, select the equivalent line, exponential function, or XY Data Pairs and define the
corresponding characteristic parameters. These are Common parameter types. Enter a numerical
value, a variable, or an expression in the text box.
Equivalent Line (DEQUL):
vt () – Vf The diode characteristic is defined by an equivalent I = --------------------- for v() t ≥ V
R limit
b
line. You have to define a value for the Forward voltage,
vt ()
Bulk resistance and Reverse resistance.
I = --------- for v() t < V
R limit
r
Vlimit stands for the intersection of the forward and reverse
characteristic and is calculated by the program itself.
Exponential Function (DEXP):
The diode characteristic is defined by an Exponential
function. You have to define values for the Saturation
current, Thermal voltage and Reverse resistance.
XY Data Pairs (DXY)
The diode characteristic is defined by a data table. You can define the table within the characteristic
dialog directly or load an existing file. The data pairs are displayed in the lookup
table and used for the characteristic. You can modify the data when necessary. See also “Separate
Component Characteristic” on page 297.
� «Element Name»
The characteristic of the diode is defined by a characteristic component. Characteristic parameter
type. Enter the name in the text box (e.g. XY1.VAL, EXP.VAL) or use the pin to connect
the characteristic component. The internal used type is D.
� � «Use pin»
If the box is checked, the name is defined by the characteristic connected to the pin, otherwise
the name in the text box is used.
Component Parameters
⎛ Vt ⎞
it () = Is ⋅ ⎜e– 1⎟
for v() t ≥ 0
⎝ ⎠
Description [Unit] Parameter Name Data Type
Characteristic; D CH real
Forward Voltage [V]; DEQUL VF real
Bulk Resistance [Ω]; DEQUL RB real
Reverse Resistance [Ω]; DEQUL/DEXP RR real
Saturation Current [A]; DEXP ISAT real
Thermal Voltage [V]; DEXP VT real
Characteristic; DXY FILE file
it ()
vt ()
---------
vt ()
=
--------- for v() t < 0
R r