DVM - Design Verification Module

Bode Plot Load

The Bode Plot Load subcircuit models a resistive load with the AC small signal source and Bode plot probe that is required to generate Bode plots. This load is used to generate the Bode plots in the BodePlot test objectives.

Other similar loads include the following:

Model Name

Bode Plot load

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_RES_BODE
  • SIMPLIS_DVM_ADVANCED_LOAD_3T_RES_BODE
  • SIMPLIS_DVM_ADVANCED_LOAD_4T_RES_BODE
Symbols
Schematic - 3 Terminal
Schematic - 4 Terminal

Bode Plot Load Parameters - AC Analysis

The following table explains the relevant parameters.

Parameter Name Default Data Type Range Units Parameter Description

LOAD_NAME

LOAD String n/a n/a

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

LOAD_RESISTANCE

2.00667 Real min: 0

The resistance value of the load

MEASURE_BODE

0 Real 0 or 1   A flag used by DVM to measure the Bode Plot for this output load. This flag also enables the small signal AC source. When both MEASURE_BODE and MULTI_TONE are equal to 1, the load is set to measure a Multi-Tone AC Bode plot.

MULTI_TONE

0 Real 0 or 1   Enables Multi-Tone AC analysis for this load. For small signal POP and AC analyses, this is set to 0.

Bode Plot Load Parameters - Multi-Tone AC Analysis

The following table summarizes the additional parameters used when a Multi-Tone AC Analysis is specified. The load uses these parameters only if the MULTI_TONE property is set to 1.

Parameter Name Default Data Type Range Units Parameter Description

DC_VOLTAGE

5 Real n/a V The common mode voltage seen by the Bode plot probe included in this load. This parameter is used only in Multi-Tone mode.

INJ_AMP

10m Real   V The RMS injection amplitude for the Multi-Tone AC source included in this load.

MEASURE_BODE

0 Real 0 or 1
 
  A flag used by DVM to measure the Bode Plot response of this load. This flag also enables the small signal AC source. When both MEASURE_BODE and MULTI_TONE are equal to 1, the load is set to measure a Multi-Tone AC Bode plot.

MULTI_TONE

0 Real 0 or 1
 
  Enables Multi-Tone AC Analysis for this load. For Multi-Tone AC Analysis, this parameter is set to 1.

N_PT

10 Real     The number of points per decade when the SWEEP_TYPE is 1 or 2. Unused when the SWEEP_TYPE is 0 or 1.

START_FREQ

1k Real   Hz The starting frequency for the Multi-Tone AC Analysis

STOP_FREQ

100k Real   Hz The ending frequency for the Multi-Tone AC Analysis

SWEEP_TYPE

1 Real 0, 1, 2 or 3
 
  One of the following:
  • 0 = Single Frequency passed as START_FREQ
  • 1 = Linear Sweep
  • 2 = Decade Sweep
  • 3 = Decade sweep with linear first decade

TIME_DELAY

10u Real   s The time delay for the AC Multi-Tone injection. This time delay is converted into a phase delay and is used to ensure that the Multi-Tone AC injection starts at the same phase angle where the FindAcSteadyState() test ended.

Output Curves

The BodePlot graph is shown below.

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