Resistive + DC Load

The Resistive + DC Load subcircuit models a load containing a constant resistance in parallel with a constant current source. In DVM, this load is not used in any test objectives, but you can set a load to use this subcircuit with a SubCkt() call in the Load column of your testplan.

In this topic:

DVM Information

Power Supply (Non-DVM) Information

Model Name

Resistive Load + DC

Simulator

This device is compatible with both the SIMetrix and SIMPLIS simulators.

Parts Selector
Menu Location

DVM > Loads > DVM Output Load - 2 Terminal
DVM > Loads > DVM Output Load - 3 Terminal
DVM > Loads > DVM Output Load - 4 Terminal

Power Supply Loads > Power Supply Load ( DC Current, Pulse, Bode, Zout... )

Symbol Library

SIMPLIS_DVM_ADVANCED.sxslb

power_supply_source_and_loads.sxslb

Model File

SIMPLIS_DVM_ADVANCED.lb

power_supply_source_and_loads.lb

Subcircuit Name

SIMPLIS_DVM_ADVANCED_LOAD_2T_RES_DC
SIMPLIS_DVM_ADVANCED_LOAD_3T_RES_DC
SIMPLIS_DVM_ADVANCED_LOAD_4T_RES_DC

POWER_SUPPLY_LOAD_RES_DC

Symbols

Schematic - 2 Terminal

Note: Power Supply probes will not have the "DVM" prefix.

Schematic - 3 Terminal

Note: Power Supply probes will not have the "DVM" prefix.

Schematic - 4 Terminal

Note: Power Supply probes will not have the "DVM" prefix.

Parameters

The following table explains the parameters used in the Resistive Load.

Parameter Name	Default	Data Type	Range	Units	Parameter Description
DC_CURRENT	500m	Real	Min: 0	A	Sets the load current of the load.
LOAD_NAME	LOAD	String	n/a	n/a	Name of the DVM load. This name cannot contain spaces.
LOAD_RESISTANCE	2.00667	Real	Min: 0	Ω	Sets the load resistance of the load.

DVM Testplan Entry

To set any managed DVM load to a Resistive Load subcircuit, use the SubCkt() testplan entry in the Load column.

The SubCkt() testplan entry changes the subcircuit type without changing any parameters. You can also use the function with an optional parameter string to set the two electrical parameters for the load.

CAUTION:

When using the SubCkt() function, you are directly setting the subcircuit name. DVM loads have three pin configurations, and you must set the pin configuration (2T, 3T, or 4T) in the subcircuit name so the subcircuit name is consistent with the symbol pin count. The following example is for the three terminal load.

SubCkt(REF, SIMPLIS_DVM_ADVANCED_LOAD_3T_RES_DC)

The following SubCkt() call changes the subcircuit to a 3-terminal resistive + DC load, sets the DC_CURRENT to 2.5A, and the LOAD_RESISTANCE to 0.4Ω

SubCkt(REF, SIMPLIS_DVM_ADVANCED_LOAD_3T_RES_DC,DC_CURRENT=2.5 LOAD_RESISTANCE=0.4)

Argument	Range	Description
REF	n/a	The actual reference designator of the DVM load or the more generic syntax of OUTPUT:`n` where `n` is an integer indicating a position in the list of DVM loads.
LOAD_RESISTANCE	min: 0	The actual, numerical resistance value for the load. No interpretation of symbolic values is made on the provided numeric value.
DC_CURRENT	min: 0	The DC current for the load.

Converting between DVM and Power Supply Loads

To change a Power Supply load to a DVM load, right click the symbol to bring up the context menu, and select the menu option: Upgrade to DVM Source/Load

To change a DVM load to a Power Supply load, right click the symbol to bring up the context menu, and select the menu option: Downgrade to SIMetrix/SIMPLIS Source/Load