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Model Kind
Current Source
Model Sub-Kind
DC Source
SPICE Prefix
I
SPICE Netlist Template Format
@DESIGNATOR %1 %2 @VALUE #"AC MAGNITUDE"|AC @"AC MAGNITUDE"| @"AC PHASE"
Parameters (definable at component level)
The following parameters are definable for this model type and are listed in the Parameters tab of the Sim Model dialog. To access this dialog, simply double-click on the entry for the simulation model link in the Models region of the Component Properties dialog.
|
Value |
- |
amplitude of the source current (in Amps). |
|
AC Magnitude |
- |
the magnitude of the source when used in an AC Small Signal Analysis (typically 1A). |
|
AC Phase |
- |
the phase of the source when used in an AC Small Signal Analysis. |
Notes
This source produces a constant current output and is generally used to power the circuit.
If a value for the DC source current is not specified, an error will occur when parsing the circuit to the Simulator.
If specifying AC criteria, the following should be observed;
If a value for the AC Magnitude is entered, a value for the AC Phase MUST also be given, otherwise an error will occur when parsing the circuit.
If a value for the AC Magnitude is omitted, but a value for AC Phase is defined, the circuit will parse to the Simulator OK, but the SPICE netlist will not contain any AC information for the source.
The simulation-ready DC current source component (ISRC) can be found in the Simulation Sources integrated library (\Program Files\Altium\Library\Simulation\Simulation Sources.IntLib).
Examples
Consider the DC voltage source in the above image, with the following characteristics:
Pin1 (positive) is connected to net N1
Pin2 (negative) is connected to net VEE
Designator is IEE
Value = 10.16E-6
No AC parameters are specified
the entry in the SPICE netlist would be:
*Schematic Netlist:
IEE N1 VEE 10.16E-6
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