Pulse usually refers to a short-term fluctuating electric shock (voltage or current) commonly used in electronic technology, which is characterized by waveform, amplitude, width and repetition frequency. The pulse shaping program can produce different pulse waveforms, and the optimal pulse waveform is different according to different applications.
Literally-the shock wave produced by pulse beating. The definition of pulse is actually like this:
The waveform of voltage (V) or current (A) is like the waveform of pulse beating on ECG. But what is the explanation of power pulse and sound pulse? The original meaning extension of pulse: mechanical forms such as waves emitted at the same time interval. 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.
From the definition of pulse, we can easily see that pulse has the characteristics of interval, so we can take pulse as a signal. The definition of pulse signal thus produces:
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. In addition, pulses are also used to express emotional impulses and demands.
Pulse signal:
A voltage or current that changes suddenly and lasts for a short time is called a pulse signal. It can be repeated periodically, irregularly or once. Pulse signal is a kind of discrete signal with different shapes. Compared with ordinary analog signals (such as sine waves), the waveforms are discontinuous on the time axis (there are obvious intervals between waveforms) but have certain periodicity. The most common pulse wave is a rectangular wave (square wave).
The pulse signal can be used to represent information, as a carrier wave, such as pulse code modulation (PCM) and pulse width modulation (PWM), and as a clock signal for various digital circuits and high-performance chips. The so-called pulse signal is a curve with countless breakpoints in plane coordinates, that is to say, in some periodic places, the limit of the point does not exist, such as sawtooth wave, and there are also digital circuit signals for computers, 0, 1.
Pulse signals, that is, signals similar to pulse jumps, are compared with DC and intermittent signals. If described by water flow, direct current means that the faucet keeps dripping, and pulse means that the faucet keeps opening and closing to form water pulse. When you turn on the flashlight, the light comes on. This is DC. If the lights are turned on and off all the time, a pulse is formed, and the switching speed is the pulse frequency.