What is digital?

Digital, also known as digital system, is a system that uses discrete 0 or 1 for information input, processing, transmission, storage, etc. In digital technology, binary is generally used, so all components have Both stable states can be used to represent binary, such as "high level" and "low level".

Digital system, also known as digital system, uses discrete (i.e. discontinuous) 0 or 1 to input and process information. , a system for transmission, storage and other processing. In contrast, non-digital (analog) systems use continuous numerical values ​​to represent information. Although the representation of numbers is discrete, the information they represent can be discrete (such as numbers, letters, etc.), or continuous (such as sounds, images, and other measurements of continuous systems, etc.)

Digital product representation is commonly used in computer science and electronics, particularly where real-world information is converted into binary digital form, such as digital audio and digital photographs. Signals carrying data are electrical or optical pulses, with each amplitude representing a logic 1 (pulse and/or high) or a logic 0 (no pulse and/or low).

Introduction

Digital technology is also called digital technology because its core content is to digitize a series of continuous information, or discontinue it.

In electronic technology, the signals that are transmitted, processed and processed can be divided into two categories: one type of signal is an analog signal, and the characteristics of this type of signal are that both in terms of time and size of the signal They are all continuously changing, and the technology used to transmit, process and process analog signals is called analog technology; the other type of signals is digital signals. The characteristic of digital signals is that they are discrete in both time and size, or They are all discontinuous. The technology of transmitting, processing and processing digital signals is called digital technology.

Comparison with analog technology

Compared with analog technology, digital technology has the following characteristics:

(1) In digital technology, it is generally The binary system is used, so any two stable states of the component can be used to represent the binary system (such as "high level" and "low level"): 0, 1. Therefore, its basic unit circuit is simple, and the precision requirements for each component in the circuit are not very strict, allowing greater dispersion of component parameters, as long as two completely different states can be distinguished. This feature is very beneficial to the realization of digital circuit integration.

(2) Strong anti-interference ability and high precision. Since digital technology transmits, processes and processes binary information, it is not susceptible to external interference and therefore has strong anti-interference ability. In addition, it can be used to increase the number of binary digits to improve accuracy.

(3) Digital signals facilitate long-term storage, allowing a large amount of valuable information resources to be preserved.

(4) Confidentiality is good, and encryption processing can be performed in digital technology to make some valuable information resources less likely to be stolen.

(5) It has strong versatility and can use standardized logical components to form a variety of digital systems.

Because digital technology has the above characteristics and is developing very rapidly, it has been increasingly widely used in electronic digital computers, numerical control technology, communication equipment, digital instruments and other sectors of the national economy.

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