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This article mainly introduces what the digital computer in the computer network is to deal with, the article is very detailed, has a certain reference value, interested friends must read it!

Digital computer takes "digital quantity" as the processing object. Because the basic working state of the computer is only 0 and 1, and the sampling of external information by the digital computer system can not be strictly continuous, it is necessary to complete only one sampling in a cycle, so the digital system deals with digital quantities.

According to the classification of electrical signals used by computers, electronic computers are divided into digital computers and analog computers, in which digital computers take "digital quantity" as the processing object.

Digital computer is the mainstream in the electronic computer industry in the world today, which internally deals with a kind of electrical signal called symbolic signal or digital signal. Its main feature is "discreteness". It is impossible for a third symbol to exist between two adjacent symbols. Because of the difference of this kind of processing signal, its structure and performance are better than that of analog computer.

Digital quantity (discrete quantity) is corresponding to analog quantity (continuous quantity). The latter is common in the natural world and can be analyzed by general mathematical methods. The digital quantity is used in the information processed by computer. Because the basic working state of the computer is only 0 and 1, and the sampling of external information by the digital computer system can not be strictly continuous, it is necessary to complete only one sampling in a cycle, so the digital system deals with digital quantities. Moreover, the digital quantity can not be analyzed completely by ordinary mathematical methods, and there are special mathematical methods for his analysis.

A physical quantity that is discrete in time and quantity is called a digital quantity. A signal that represents a digital quantity is called a digital signal. An electronic circuit that works under a digital signal is called a digital circuit.

For example, when the number of parts output from an automatic production line is recorded by an electronic circuit, a signal is given to the electronic circuit every time a part is sent, while usually the signal added to the electronic circuit when no parts are sent is 0, which is counted. It can be seen that the signal of the number of parts is discontinuous in time and quantity, so it is a digital signal. The smallest unit of quantity is one.

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