Triangle Waveform Source

The Triangle Waveform Source subcircuit models a repeating triangle waveform source. This source is not used in any test objectives, but you can set a source to use this subcircuit with a Tri() call in the Source column of your testplan.

Other similar pulsed voltage sources include:

In this topic:

Model Name	Triangle Waveform Source
Simulator		This device is compatible with both the SIMetrix and SIMPLIS simulators.
Parts Selector Menu Location	DVM > Sources > DVM Input 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_TRI
Symbols
Schematic

Triangle Waveform Source Parameters

The following table explains the relevant parameters.

Parameter Name	Default	Data Type	Range	Units	Parameter Description
DRATIO	0.5	Real	0 to 1		The duty cycle ratio for the triangle waveform source
FINAL_VOLTAGE	750m	Real		V	The peak or maximum voltage for the triangle waveform source. This can be a numeric value or a symbolic value, such as a percentage of nominal input voltage.
FREQUENCY	10k	Real	min: > 0	Hz	The frequency of the source pulse
IDLE_IN_POP	0	Real	0 or 1		If set to 0, the source voltage during the POP analysis is set to the START_VOLTAGE; otherwise the source will be active during the POP analysis.
SOURCE_NAME	SRC	String	n/a	n/a	Name of the DVM source. This name cannot contain spaces.
OFF_UNTIL_DELAY	0	Real	0 or 1		If set to 1, the source voltage will be the START_VOLTAGE until the time specified by TIME_DELAY. If set to 0, the value of TIME_DELAY is interpreted as a phase delay.
PHASE_ANGLE	90	Real		°	The phase angle of the triangle waveform, used only if the USE_PHASE parameter is 1.
START_VOLTAGE	0	Real		V	The valley or starting voltage for the triangle waveform source. This can be a numeric value or a symbolic value, such as a percentage of nominal input voltage.
TIME_DELAY	10u	Real	min: 0	s	The delay before the source voltage pulse starts. The source behavior before the TIME_DELAY is determined by the OFF_UNTIL_DELAY parameter.
USE_PHASE	0	Real	0 or 1		If set to 1, the source is configured to use the phase angle supplied by the PHASE_ANGLE parameter.

Testplan Entry

To set any managed DVM source to a Triangle Waveform Source subcircuit, place a Tri() testplan entry in the Source column.

The Tri() testplan entry has the following syntax with the arguments taken from the list of Triangle Waveform Source Parameters above.

Tri(REF, START_VOLTAGE, FINAL_VOLTAGE, FREQUENCY, DRATIO)
Tri(REF, START_VOLTAGE, FINAL_VOLTAGE, FREQUENCY, DRATIO, OPTIONAL_PARAMETER_STRING)

Argument	Range	Description
REF	n/a	The actual reference designator of the DVM source or the more generic syntax of INPUT:`n` where `n` is an integer indicating a position in the list of DVM sources.
START_VOLTAGE	n/a	The valley or starting voltage for the triangle waveform source. This can be a numeric value or a symbolic value, such as a percentage of nominal input voltage.
FINAL_VOLTAGE	n/a	The peak or maximum voltage for the triangle waveform source. This can be a numeric value or a symbolic value, such as a percentage of nominal input voltage.
FREQUENCY	min: > 0	The frequency of the triangle waveform source
DRATIO	0 to 1	The duty ratio of the source
OPTIONAL_PARAMETER_STRING	n/a	Parameter string with any of the other parameters from the parameter table above*

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

Examples

The following examples set the first DVM managed source to a Triangle Waveform Source with a starting voltage of 0V and a final voltage of 1V. The timing parameters and the optional parameter strings are different for each example.

Note: In all of the examples below, the Source column is the first column in the testplan and, therefore, begins with the special three character sequence: *?@.

Zero Time Delay Example

Since the TIME_DELAY parameter is set to zero, the triangle wave begins with a START_VOLTAGE value of 0 at t=0.

*?@ Source
Tri(INPUT:1, 0, 1, 10k, 0.70, TIME_DELAY=0)

The results of this testplan entry are shown below:

Time Delay Example

In this example, the TIME_DELAY parameter is set to 25us. Since the OFF_UNTIL_DELAY parameter is not specified, the TIME_DELAY is interpreted as a phase delay.

*?@ Source
Tri(INPUT:1, 0, 1, 10k, 0.70, TIME_DELAY=25u)

The results of this testplan entry are shown below:

Time Delay Example With OFF_UNTIL_DELAY=1

In this example, the TIME_DELAY parameter is set to 25us, and the OFF_UNTIL_DELAY is set to 1; therefore, for simulation times less than the TIME_DELAY parameter, the source voltage is 0V, which is the value of the START_VOLTAGE argument.

*?@ Source
Tri(INPUT:1, 0, 1, 10k, 0.70, TIME_DELAY=25u OFF_UNTIL_DELAY=1)

The results of this testplan entry are shown below: