DVM - Design Verification Module

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:

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Model Name

Triangle Waveform Source

Simulator

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

Parts Selector
Menu Location
  • DVM ▶Sources ▶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_2T_TRI
  • SIMPLIS_DVM_ADVANCED_SOURCE_3T_TRI
  • SIMPLIS_DVM_ADVANCED_SOURCE_4T_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 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 managed 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:

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