Pulse wave

This article is about a pulse waveform. For a heart beat, see Pulse. For a Dirac pulse train, see Sampling function. For the aperiodic version, see Pulse function.
For other uses, see Pulse (disambiguation).

A pulse wave's duty cycle D is the ratio between pulse duration 𝜏 and period T.

A pulse wave, pulse train, or rectangular wave is a sequence of discrete pulses occurring in a signal over time. Typically, these pulses are of similar shape and are evenly spaced in time, forming a periodic or near-periodic sequence. Pulse waves outputs are widely used in tachometers, speedometers and encoders. Such pulse sequences appear in multiple fields of technology and engineering, where a pulse wave often denotes a series of electrical pulses generated by a sensor (for example, teeth of a rotating gear inducing pulses in a pickup sensor), or pulse wave is connected to signal processing and computer graphics, where a pulse wave is treated as a mathematical signal or function that repeats with a fixed period.

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