DVM - Design Verification Module

DC Input Susceptibility Source

The DC input susceptibility source injects a small signal AC voltage into the input during an AC analysis. For the POP and transient analyses, the small signal portion of the source is disabled and the source is modeled by a constant DC voltage and a source resistance.

Unlike the DC Input Impedance Source, this source doesn't include any probes to generate the conducted susceptibility plots. Instead, the plots are created using a special conducted susceptibility probe.

Model Name	DC Input Susceptibility Source
Simulator		This device is compatible with both the SIMetrix and SIMPLIS simulators.
Parts Selector Menu Location	DVM ▶ Source ▶ Input 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_DC_SUSCEPTIBILITY
Schematic

DC Input Susceptibility Source Parameters

The following table explains the relevant parameters.

Parameter Name	Default	Data Type	Range	Units	Parameter Description
DC_VOLTAGE	5	Real	min:0	V	DC voltage of input source
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.
MEASURE_SUSCEPTIBILITY	0	Real	0 or 1		A flag used by DVM to measure the Conducted Susceptibility for this input source. This flag also enables the small signal AC source. When both MEASURE_SUSCEPTIBILITY and MULTI_TONE are equal to 1, the source is set to measure a Multi-Tone Input Impedance.
MULTI_TONE	0	Real	0 or 1		Enables Multi-Tone AC analysis for this source. For small signal POP and AC analyses, this is set to 0.

DC Input Susceptibility Source - Multi-Tone AC Analysis

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

Parameter Name	Default	Data Type	Range	Units	Parameter Description
INJ_AMP	10m	Real		V	The RMS injection amplitude for the Multi-Tone AC source included in this source.
MEASURE_SUSCEPTIBILITY	0	Real	0 or 1		A flag used by DVM to measure the Conducted Susceptibility for this input source. This flag also enables the small signal AC source. When both MEASURE_SUSCEPTIBILITY and MULTI_TONE are equal to 1, the source is set to measure a Multi-Tone Input Impedance.
MULTI_TONE	0	Real	0 or 1		Enables Multi-Tone AC analysis for this source. For small signal POP and AC analyses, this is set to 0.
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.