DVM - Design Verification Module

Pulse Auxiliary Source

The pulse input source can be used to pulse a voltage between two or three voltages. The source includes probes for both the source voltage and current.

Model Name

Pulse Auxiliary Source

Simulator

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

Parts Selector
Menu Location

DVM ▶Source ▶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_PULSE
Schematic DVM Pulse Aux. Source

Pulse Auxiliary Source Parameters

The following table explains the relevant parameters.

Parameter Name Default Data Type Range Units Parameter Description

FALL_TIME

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

FINAL_VOLTAGE

 12 Real   V The final voltage of the source

PULSE_VOLTAGE

 9 Real   V The pulse voltage of the source

PULSE_WIDTH

 200u Real min: 0 s The time which the source voltage is the PULSE_VOLTAGE

RISE_TIME

 100u Real min: 0 s The pulse 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   V The starting voltage for the source

TIME_DELAY

 10u Real min: 0 s

The time delay before the pulse initiates

Testplan Entry for the Pulse Auxiliary Source

To set any DVM Aux source to a Pulse Auxiliary Source subcircuit, place a Pulse testplan entry in the Source column.

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

Pulse(REF, START_VOLTAGE, PULSE_VOLTAGE, FINAL_VOLTAGE)
Pulse(REF, START_VOLTAGE, PULSE_VOLTAGE, FINAL_VOLTAGE, OPTIONAL_PARAMETER_STRING)

where:

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.

PULSE_VOLTAGE

min: 0

The pulse voltage for the source.

FINAL_VOLTAGE

min: 0

The final voltage for the source.

OPTIONAL_PARAMETER_STRING

n/a

Parameter string with a combination of one or more timing parameters:

  • TIME_DELAY*
  • RISE_TIME*
  • PULSE_WIDTH*
  • FALL_TIME*

*    If more than one parameter is specified, join the parameter key-value pairs with a space, as shown in the example below. The order of the parameter names does not matter.

Timing

The timing for the Pulse Source is determined by the following parameters.

Timing parameters can be assigned using the optional parameter string as shown in the following examples.

Symmetric Pulse Example

This example shows a symmetric pulse with equal rise and fall times. The final voltage is the same as the starting voltage.

*?@ Source
Pulse(V5, 1, 5, 1, TIME_DELAY=25u RISE_TIME=25u PULSE_WIDTH=100u FALL_TIME=25u)

The results of this testplan entry are shown below:

Annotation Value
X0 TIME_DELAY
X1 TIME_DELAY + RISE_TIME
X2 TIME_DELAY + RISE_TIME + PULSE_WIDTH
X3 TIME_DELAY + RISE_TIME + PULSE_WIDTH + FALL_TIME
Y0

START_VOLTAGE
Y1 PULSE_VOLTAGE
Y2 PULSE_VOLTAGE
Y3

FINAL_VOLTAGE

Asymmetric Pulse Example

The following example sets the DVM Aux Source with reference designator V5 to a Pulse Aux Voltage Source, with a starting voltage of 1V, a pulse voltage of 5V and a final voltage of 4.5V. Note the rise and fall times are not the same and the pulse does not have to return to the starting voltage value.

*?@ Source
Pulse(V5, 1, 5, 4.5, TIME_DELAY=25u RISE_TIME=25u PULSE_WIDTH=75u FALL_TIME=50u)

The results of this testplan entry are shown below:

Annotation Value
X0 TIME_DELAY
X1 TIME_DELAY + RISE_TIME
X2 TIME_DELAY + RISE_TIME + PULSE_WIDTH
X3 TIME_DELAY + RISE_TIME + PULSE_WIDTH + FALL_TIME
Y0

START_VOLTAGE
Y1 PULSE_VOLTAGE
Y2 PULSE_VOLTAGE
Y3

FINAL_VOLTAGE

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