DVM - Design Verification Module

Pulse Load - Single Pure Current Pulse

The Pulse Load - Single Pure Current Pulse subcircuit models a single pulse without a resistive load. For a single current pulse load with a resistive component, see the Pulse Load - Single Current Pulse. This load is not used in any test objectives, but you can set any managed DVM load to use this subcircuit with a PulsePure() call in the Load column of your testplan.

In this Topic Hide

Model Name

Pulse Load - Single Current Pulse

Simulator

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

Parts Selector
Menu Location
  • DVM ▶Loads ▶DVM Output Load - 2 Terminal
  • DVM ▶Loads ▶DVM Output Load - 3 Terminal
  • DVM ▶Loads ▶DVM Output Load - 4 Terminal

Symbol Library

None - the symbol is automatically generated when placed or edited.

Model File

SIMPLIS_DVM_ADVANCED.lb
Subcircuit Name
  • SIMPLIS_DVM_ADVANCED_LOAD_2T_PULSE_PURE
  • SIMPLIS_DVM_ADVANCED_LOAD_3T_PULSE_PURE
  • SIMPLIS_DVM_ADVANCED_LOAD_4T_PULSE_PURE
Symbols
Schematic - 2 Terminal
Schematic - 3 Terminal
Schematic - 4 Terminal

Pulse Load - Single Pure Current Pulse Parameters

The table below explains the parameters used in the Pulse Load - Single Pure Current Pulse subcircuit.

Parameter Name Default Data Type Range Units Parameter Description

FALL_TIME

 50u Real min: 0 s The pulse fall time in seconds

FINAL_CURRENT

 750m Real min: 0 A

The final current for the load. The Pulse Load - Single Pure Current Pulse continues at this current for all simulation times greater tha TIME_DELAY+RISE_TIME. This can be a numeric value or a symbolic value, such as a percentage of full load.

LOAD_NAME

 LOAD String n/a n/a

Name of the DVM load. This name cannot contain spaces.

PULSE_CURRENT

 250m Real min: 0 A The pulsed current in amps. The pulse current can be a numeric value or a symbolic value, such as a percentage of full load.

PULSE_WIDTH

 200u Real min: 0 s The pulse width in seconds. Note that DVM considers the pulse width to be the duration of the pulse at the PULSE_CURRENT.

RISE_TIME

 100u Real min: 0 s The pulse rise time in seconds

START_CURRENT

 0 Real min: 0 A The starting current for the load. This can be a numeric value or a symbolic value, such as a percentage of full load.

TIME_DELAY

 10u Real min: 0 s

The time delay before the pulse initiates

Testplan Entry for the Pulse Load - Single Pure Current Pulse

To set any managed DVM load to a Pulse Load - Single Pure Current Pulse subcircuit, place a PulsePure() testplan entry in the Load column.

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

PulsePure(REF, START_CURRENT, PULSE_CURRENT, FINAL_CURRENT)
PulsePure(REF, START_CURRENT, PULSE_CURRENT, FINAL_CURRENT, OPTIONAL_PARAMETER_STRING)

where:

Argument Range Description

REF

n/a

The actual reference designator of the DVM load or the more generic syntax of OUTPUT:n where n is an integer indicating a position in the list of managed DVM loads. 

START_CURRENT

min: 0

The starting current for the load. This can be a numeric value or a symbolic value, such as a percentage of full load.

PULSE_CURRENT

min: 0

The pulse current for the load. This can be a numeric value or a symbolic value, such as a percentage of full load.

FINAL_CURRENT

min: 0

The final current for the load. This can be a numeric value or a symbolic value, such as a percentage of full load.

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 Pure Load 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 current is the same as the starting current.

*?@ Load
PulsePure(OUTPUT:1, 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_CURRENT
Y1 PULSE_CURRENT
Y2 PULSE_CURRENT
Y3

FINAL_CURRENT

Asymmetric Pulse Example

The following example sets the first DVM managed load to a Pulse Load - Single Pure Current Pulse, with a starting current of 1A, a pulse current of 5A and a final current of 4.5A. Note the rise and fall times are not the same and the pulse does not have to return to the starting current value.

*?@ Load
PulsePure(OUTPUT:1, 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_CURRENT
Y1 PULSE_CURRENT
Y2 PULSE_CURRENT
Y3

FINAL_CURRENT

© 2015 simplistechnologies.com | All Rights Reserved