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 |
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This device is compatible with both the SIMetrix and SIMPLIS simulators. |
| Parts Selector Menu Location |
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| 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 | |
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| Schematic |
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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 | Ω | 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.
| *?@ Source |
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| 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 |