Programming instructions

Source Components
Multisim Component Reference Guide 1-50 ni.com
Expressions may use reference branch currents through voltage source elements using the
syntax
I(<source_type><refdes>), where <source type> is a single letter
specifying a the type of SPICE primitive source and
<refdes> is the schematic reference
designator of the voltage source.
Multisim supports referencing current through four types of SPICE primitive voltage sources:
• Independent source ("V" source)
• Voltage-Controlled Voltage-Source ("E" source)
• Current-Controlled Voltage-Source ("H" source)
• ABM source ("B" source).
 To easily determine the referenced source type:
1. Click the Model button in the Select a Component dialog. The component's SPICE template
displays as in the example below.
The first letter of the model template must be one of
V,E,H, or B. This is the
<source_type>. If the first letter is any but V,E,H, or B (e.g., templates using
SUBCKTs), you may not reference current passing through this component.
In the case of a circuit branch in which there is no voltage source component, or there is a
voltage source component which may not be referenced, break the branch and insert a 0-volt
voltage source that has valid template for referencing (e.g., the DC_POWER component).
ComponentRef.book Page 50 Thursday, December 7, 2006 10:12 AM