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PulseGenerator

Sources

The Pulse Generator block creates square wave pulse signals with configurable parameters. It generates periodic pulses that alternate between high and low values, making it useful for creating timing signals, reference waveforms, and test inputs for digital systems.

The block produces a square wave output that spends a portion of each period at the high amplitude level (determined by the duty cycle) and the remainder at zero. The phase delay allows for shifting the pulse timing relative to the simulation start.

Mathematical Model

The Pulse Generator block implements:

y(t) = \begin{cases} A, & (t + \text{delay}) \bmod P < \frac{D}{100} P \\ 0, & \text{otherwise} \end{cases}

Where:

t is simulation time
amplitude is pulse height
period is time between pulse starts
dutyCycle is percentage of time signal is high
phaseDelay is time offset

Inputs & Outputs

Direction	ID	Label	Type	Status
→ In	`trigger`	Trigger	number	Optional
← Out	`out`	Output	number	Output

Parameters

Parameters	Label	Type	Default	Description
`amplitude`	Amplitude	number	`1`
`period`	Period	number	`1`
`dutyCycle`	Duty Cycle	number	`50`
`phaseDelay`	Phase Delay	number	`0`
`numberOfPulses`	Number of Pulses (0=∞)	number	`0`	Number of pulses to generate (0 for infinite)
`enableTrigger`	Show Trigger Input	boolean	`false`	Enables the external reset trigger input

Usage Examples

1Hz Square Wave

Basic 50% duty cycle signal:

PulseGenerator (period: 1, dutyCycle: 50) → NumericDisplay

Short Pulse Trigger

Generate a 0.1s pulse every 2 seconds:

PulseGenerator (period: 2, dutyCycle: 5) → LogicSystem

Remarks & Best Practices

Timing Alignment: Use phaseDelay to align pulses with other time-based signals.
Discrete Events: Ideal for representing clock signals or periodic activations.
Simulation Step: For very short pulses, ensure the simulation step size is small enough to capture the pulse high-time.

Related Components

SignalGenerator: For bipolar square waves and other periodic signals
Step: For a single transition event
Constant: For steady signal sources