DVM - Design Verification Module

Pulse Input Source - Repeating Pulse

The Pulse Source - Repeating Pulse subcircuit models a repeating pulsed voltage source. This source is not used in any test objectives, but you can set a source to use this subcircuit with a Pul() call in the Source column of your testplan.

Other similar pulsed voltage sources include:

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Model Name

Pulse Source - Single Voltage Pulse

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_PUL

Symbols
Schematic - 2 Terminal

Pulse Source - Repeating Pulse Parameters

The following table explains parameters used in the Repeating Pulse Source.

Parameter Name Default Data Type Range Units Parameter Description

FALL_TIME

50u Real min: 0 s The fall time of the source voltage pulse

FINAL_VOLTAGE

750m Real   V The pulse or final voltage for the source pulse. This can be a numeric value or a symbolic value, such as a percentage of full source

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 voltage pulse, used only if the USE_PHASE parameter is 1.

PULSE_WIDTH

200u Real min: 0 s The pulse width of the source, excluding the rise and fall times

RISE_TIME

100u Real min: 0 s The rise time of the source voltage pulse

START_VOLTAGE

0 Real   V The lower or starting voltage for the source voltage pulse. 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 for the Repeating Pulse Source

To set any managed DVM source to a Repeating Pulse Source subcircuit, place a Pul() testplan entry in the Source column.

The Pul() testplan entry has the following syntax with the arguments taken from the list of parameters above.

Pul(REF, START_VOLTAGE, FINAL_VOLTAGE, FREQUENCY, RISE_TIME, FALL_TIME, PULSE_WIDTH)
Pul(REF, START_VOLTAGE,
FINAL_VOLTAGE, FREQUENCY, RISE_TIME, FALL_TIME, PULSE_WIDTH, 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 lower or starting voltage for the source voltage pulse
FINAL_VOLTAGE n/a The pulse or final voltage for the source pulse
FREQUENCY min: > 0 The frequency of the source pulse
RISE_TIME min: 0 The rise time of the source voltage pulse
FALL_TIME min: 0 The fall time of the source voltage pulse
PULSE_WIDTH min: 0 The pulse width of the source, excluding the rise and fall times
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 Repeating Pulse Source with a starting voltage of 0V and a final voltage of 5V. The timing parameters and the optional parameter strings are different for each example.

Zero Time Delay Example

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

*?@ Source
Pul(INPUT:1, 0, 5, 10k, 6u, 10u, 22u, 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 75us. Since the OFF_UNTIL_DELAY parameter is not specified, the TIME_DELAY is interpreted as a phase delay.

*?@ Source
Pul(INPUT:1, 0, 5, 10k, 6u, 10u, 22u, TIME_DELAY=75u)

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 75us, 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
Pul(INPUT:1, 0, 5, 10k, 6u, 10u, 22u, TIME_DELAY=75u OFF_UNTIL_DELAY=1)

The results of this testplan entry are shown below:

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