Source Statement Functions

PULSE Function

PULSE initialValue pulsedValue <delayTime <riseTime <fallTime <pulseWidth <period>>>>>

Note

At t=delayTime, the pulse will start at initialValue and change to pulsedValue within riseTime. Consequently, a pulse without delay, rise and fall time PULSE 0 1 0 0 0 will output 0 in the very first simulation step and 1 in the next. This differs from the PLECS pulse which starts in high-state.

Table 24 PULSE Parameters

Parameter	Default	Description
initialValue	required	Initial value before pulse
pulsedValue	required	Value during pulse
delayTime	0	Absolute time after which the pulse starts (not phase delay)
riseTime	0	Time for rising edge transition
fallTime	0	Time for falling edge transition
pulseWidth	\(\infty\)	Duration of the pulse at pulsedValue
period	\(\infty\)	Period of the pulse waveform

SIN/SINE Function

SIN<E> offset amplitude <frequency <delay <damping>>>

Table 25 SIN Parameters

Parameter	Default	Description
offset	required	DC offset
amplitude	required	Amplitude of sine wave
frequency	0	Frequency in Hz
delay	0	Absolute time after which the sine starts (not phase delay)
damping	0	Damping factor

Note

Our default frequency of 0 differs from most other SPICE versions where \(1/T_\text{stop}\) is used.

SFFM Function

SFFM offset amplitude <frequency <modulationIndex <signalFrequency>>>

Table 26 SFFM Parameters

Parameter	Default	Description
offset	required	DC offset
amplitude	required	Carrier amplitude
frequency	0	Carrier frequency in Hz
modulationIndex	0	Modulation index
signalFrequency	0	Signal frequency in Hz

Note

Our default frequency of 0 differs from most other SPICE versions where \(1/T_\text{stop}\) is used.

EXP Function

EXP initialValue pulsedValue <riseDelayTime <riseTimeConstant <fallDelayTime <fallTimeConstant>>>>

Table 27 EXP Parameters

Parameter	Default	Description
initialValue	required	Initial value
pulsedValue	required	Pulsed value
riseDelayTime	0	Delay before rising exponential starts
riseTimeConstant	0	Time constant for rising exponential
fallDelayTime	0	Delay before falling exponential starts
fallTimeConstant	0	Time constant for falling exponential

Note

Our defaults for riseTimeConstant, fallDelayTime, and fallTimeConstant differ from most SPICE versions where \(1/T_\text{step}\) is used.

PWL Function

PWL t1 v1 t2 v2 <t3 v3 <...>>

Piecewise linear interpolation with value v1 at time t1, v2 at time t2, etc.

Table 28 PWL Requirements

Requirement	Description
Time ordering	Times must be strictly increasing: \(t_1 < t_2 < t_3 < \ldots\)
Minimum points	At least one time-value pair required