DVM - Design Verification Module
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The Square Waveform Source subcircuit models a repeating square wave source voltage with zero rise and fall times. This source is not used in any test objectives, but you can set a source to use this subcircuit with a Squ() call in the Source column of your testplan.
Other similar pulsed voltage sources include:
Similar pulsed sources which have only a single pulse include:
In this Topic Hide
Model Name |
Square Waveform Source |
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Simulator |
This device is compatible with both the SIMetrix and SIMPLIS simulators. | |
Parts Selector |
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Symbol Library |
None - the symbol is automatically generated when placed or edited. |
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Model File |
SIMPLIS_DVM_ADVANCED.lb |
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Subcircuit Name | SIMPLIS_DVM_ADVANCED_SOURCE_SQU |
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Symbols | ||
Schematic |
The following table explains the relevant parameters.
Parameter Name | Default | Data Type | Range | Units | Parameter Description |
FINAL_VOLTAGE |
750m | Real | V | The peak or final voltage for the source pulse. 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 voltage pulse, used only if the USE_PHASE parameter is 1. | |
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. |
To set any managed DVM source to a Square Waveform Source subcircuit, place a Squ() testplan entry in the Source column.
The Squ() testplan entry has the following syntax with the arguments taken from the list of parameters above.
Squ(REF, START_VOLTAGE, FINAL_VOLTAGE,
FREQUENCY)
Squ(REF, START_VOLTAGE,
FINAL_VOLTAGE, FREQUENCY, 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 square-wave 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 square-wave 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 square-wave 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.
The following examples set the first DVM managed source to a Square Waveform 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.
Since the TIME_DELAY parameter is set to zero, the square wave begins with the FINAL_VOLTAGE value of 5 at t=0.
*?@ Source | ||||
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Squ(INPUT:1, 0, 5, 10k, TIME_DELAY=0) |
The results of this testplan entry are shown below:
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 | ||||
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Squ(INPUT:1, 0, 5, 10k, TIME_DELAY=75u) |
The results of this testplan entry are shown below:
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 | ||||
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Squ(INPUT:1, 0, 5, 10k, TIME_DELAY=75u OFF_UNTIL_DELAY=1) |
The results of this testplan entry are shown below:
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