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:

Impedance Load - resistive load used for output impedance test objectives.

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	Ω	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 impedance 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_MODE is 1 or 2. Unused when the SWEEP_MODE is 0.
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 or 2		One of the following: 0 = Linear Sweep 1 = Decade Sweep 2 = 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.