Ramp Auxiliary Source

The ramp auxiliary source is used whenever you need a ramp or step voltage source. The source includes probes for both the source voltage and current.

In this topic:

Model Name Ramp Auxiliary Source
Simulator This device is compatible with both the SIMetrix and SIMPLIS simulators.
Parts Selector
Menu Location
DVM > Sources > DVM Aux. Source
Symbol Library None - the symbol is automatically generated when placed or edited.
Model File SIMPLIS_DVM_ADVANCED.lb
Subcircuit Name SIMPLIS_DVM_ADVANCED_SOURCE_AUX_RAMP
Symbols
Schematic

Ramp Auxiliary Source Parameters

The following table explains the relevant parameters.

Parameter Name Default Data Type Range Units Parameter Description
FINAL_VOLTAGE 12 Real min: 0 V The final voltage for the source
RISE_TIME 100u Real min: 0 s The ramp rise time in seconds
SOURCE_NAME SRC String n/a n/a Name of the DVM source. This name cannot contain spaces.
SOURCE_RESISTANCE 0.4 Real min:0 Sets the source resistance of the source
START_VOLTAGE 5 Real min: 0 V The starting voltage for the source
TIME_DELAY 10u Real min: 0 s The time delay before the ramp initiates

Testplan Entry for the Ramp Auxiliary Source

To set any DVM AUX source to a Ramp Source subcircuit, place a Ramp() testplan entry in the Source column.

The Ramp() testplan entry has the following syntax with the arguments explained in the table below.

Ramp(REF, START_VOLTAGE, FINAL_VOLTAGE)
Ramp(REF, START_VOLTAGE, FINAL_VOLTAGE, OPTIONAL_PARAMETER_STRING)
Argument Range Description
REF n/a The actual reference designator of the DVM AUX source.
START_VOLTAGE min: 0 The starting voltage for the source.
FINAL_VOLTAGE min: 0 The final voltage for the source.
OPTIONAL_PARAMETER_STRING n/a Parameter string with timing parameters TIME_DELAY and/or RISE_TIME*

 *   If both parameters are specified, join the two parameter key-value pairs with a space, as shown in the example below. The order of the parameter names does not matter.

Example

The following example sets the Aux source with reference designator V5  to a Ramp Source, with a starting voltage of 1V and a final voltage of 5V. The optional parameter string in this example sets the time delay to 25us and the rise time to 100us.

Note: In this examples, the Source column is the first column in the testplan and, therefore, begins with the special three character sequence: *?@.
*?@ Source
Ramp(V5, 1, 5, TIME_DELAY=25u RISE_TIME=100u)

The results of this testplan entry are shown below:

Annotation Parameter Value
X0 TIME_DELAY
X1 TIME_DELAY + RISE_TIME
Y0 START_VOLTAGE
Y1 FINAL_VOLTAGE