Academically, pulse is defined as the process of physical quantity change that suddenly changes in a short time and then quickly returns to the initial value, which is called pulse. Pulse usually refers to a short-term fluctuating electric shock (voltage or current) commonly used in electronic technology.

Compared with continuous signals (signals with short time in the whole signal period), there is no signal in most pulse signal periods. Just like a person's pulse. Pulse signal generally refers to digital signal, which has been half the time (or even longer) in a cycle. The signal in the computer is a pulse signal, also known as a digital signal.

Extended data:

The pulse shaping program can produce different pulse waveforms, and the optimal pulse waveform is different according to different applications.

1, square wave

Square wave pulse includes square wave, Boxcar function and rectangular function. In digital signal, the transition from low level to high level is called rising edge, while the transition from high level to low level is called falling edge. If a rising or falling edge is detected in a digital system, or it only works in this case, it is called edge triggering. Digital timing diagram is an example of many square waves.

2. Nyquist pulse

Nyquist pulse is a pulse that meets the Nyquist intersymbol interference standard and is very important in data transmission. Sinc function is a pulse that meets the Nyquist intersymbol interference standard, so it is very important in signal processing theory. But because of causality, no real signal generator can generate sinc function.

3. Gaussian pulse

Gaussian pulse is a pulse whose shape is Gaussian function, which is generated by Gaussian filter. It is the fastest transient pulse without overshoot and minimum group delay.

Baidu encyclopedia pulse