Digital Electronics - Advantages, Applications, Development Trends
Updatezeit: 2022-06-06 17:28:42
Digital Electronics Overview
1、Definition of Digital Electronics
Digital electronics study various integrated devices and logic gate circuits, integrated chip functions, and applications. With the current rapid development of computer technology, using digital circuits for signal processing is particularly obvious.
Take digital circuit processing signals as an example: in the processing process, digital circuits convert analog signals into a series of digital signals according to a specific ratio. After all the analog signals are converted, the digital signals are transferred to the digital circuit for a series of the processing; the digital circuit completes the processing work based on the need to convert these final results to the corresponding analog signals. In the final step of the digital circuit processing signal, the output is converted analog signal.
2. Classification of digital electronics technology
The current classification of digital electronics technology is generally accepted by the public: analog electronics and digital electronics technology.
As the fastest growing discipline in society, digital electronics technology has a wide range of applications in all walks of life during the rapid development of social and economic requirements. In just 50 years, digital electronics has developed from the most primitive small-scale integrated circuits to today's super large-scale integrated circuits. In terms of innovative technology, digital electronics has shown amazing potential.
Advantages of digital electronics
The most common aspect of signal processing is the conversion between analog and digital signals. The "0101" signal that we often hear is a converted digital signal.
Compared with analog electronics, digital electronics technology has several advantages.
1, analog signals in the waveform variety, while the waveform is rich in change. In contrast, the digital signal waveform appears very simple, with only low and high levels of such two.
2. Compared with analog signals, digital models are more efficient in signal reception and signal processing. Continuous signals make up the waveform of an analog signal. This characteristic of analog signals makes them susceptible to external interference in signal acquisition and transmission, and information errors quickly occur.
3, the acquisition of analog signals often does not have high accuracy, resulting in inaccurate experimental data. Unlike analog signals, digital signals in the waveform single, only two, can well ensure the stability of the signal. Its anti-interference ability is analog signals can not be compared. Digital signals improve signal accuracy to a large extent, increasing the experimental reliability.
Digital circuits have many advantages such as high stability, high reliability, programmability, ease of design, economy, etc. Their applications are becoming more and more widespread. Digital signals have replaced more and more analog information in modern electronic engineering. For example, video images and sound from the original analog tape storage into the current CD-ROM storage, traffic light controller, car carburetor control device from the previous electromechanical control into the current microprocessor control.
The mechanism of converting analog signal to digital signal
The conversion process between analog and digital signals is mainly carried out in the sensor and the analog signal in the whole conversion process. Through the sensor filtering and other operations, until the end of the operation, the analog signal will be converted into a digital signal. The process of processing a signal using a digital circuit is.
The analog signal is converted into a digital signal according to a specific ratio;
After the analog signal is converted, the digital signal is transferred to the digital circuit for processing;
Converting the final processing result in the digital circuit to the corresponding analog signal as needed;
output the converted analog signal.
There are two reasons for the conversion of analog signals:
The analog signal is very susceptible to interference from the external environment because of its variability. The digital circuit has a limited variety of waveforms to ensure that it has a strong anti-interference ability, and the disturbing waveform, as long as it does not exceed a certain limit, can always be recovered through some shaping circuit, which ensures the accuracy and reliability of the signal, and based on the gate circuit, integrated chip digital circuits also have the advantages of simple construction, high reliability, and easy maintenance and scheduling. Therefore, digital electronics are suitable for use in information processing.
There are countless types of analog signal waveforms, and the slightest change in a waveform can turn it into a completely different waveform. However, digital signals currently have only two types of waveforms: low and high. Therefore, digital signals will greatly reduce the difficulty of signal processing.
Application of digital electronics technology
1、In the "radar receiver" application
The application of digital electronics technology in the radar receiver is mainly reflected in the following aspects.
Digital electronics technology allows the radar receiver to have four functions: demodulation, amplification, filtering, and frequency conversion. The filtering function ensures that the useless information and interference information is effectively filtered out, and the effective target echo number is retained; the demodulation and amplification functions ensure the correct conversion and output of the target echo signal.
The use of digital electronics in the radar receiver makes the radar receiver has a very high sensitivity. At the same time, the signal reliability is further improved, and the anti-interference is multiplied. The digital electronic technology involved in the radar receiver mainly has digital filtering technology, digital frequency conversion technology, etc...
In short, the combination of radar receiver and digital electronics technology allows the traditional receiver has a more powerful function.
2、based on the USB bus "microwave power measurement meter."
Based on the USB bus "microwave power measurement meter," digital electronics as a development tool, combined with the corresponding computer software to accurately measure microwave power.
The USB bus-based "microwave power meter" consists of the microwave detection circuit and the USB interface. The microwave power measurement meter works as follows: The detector collects the power signal. After collecting the signal, the signal is effectively processed by the microwave detection circuit, such as denoising. According to the processing results of the microwave detection circuit, the signal data is further corrected; The modified data is uploaded to the host computer with the help of the USB interface; The host computer processes the received data.\
In short, the use of digital electronics in the USB bus-based "microwave power measurement meter" makes it more accurate.
3、Application in the network
At present, our life is inseparable from the network. The network makes our life more convenient. The application of digital electronics in the network accelerated the speed of network technology updates, while the network catalyzed the rapid development of digital electronics.
The application of digital electronics in the network has become an unparalleled prospect. The application of digital signals in the network has shown incomparable advantages. The application of digital signals in the network improves the stability of the network, enhances its anti-interference ability, and further improves the network's storage capacity so that the network information transmission is more secure and faster. In general, the combination of digital electronics technology and networks is the product of comprehensive digitalization and equipment integration.
The integration of digital electronics and network technology leads to the development of information technology in the information age, which is urgently needed for the current innovation of information technology. The combination of digital electronics and network technology accelerates the rapid development of information technology construction while also invisibly changing the way we live and produce. The application of digital electronics technology in the network marks the rapid development of the information age.
Take network information processing as an example. The application of digital electronics technology has greatly improved the efficiency of information processing, while the information transmission capacity is enhanced exponentially. Under the application of digital electronics technology, the speed of signal transformation into a digital signal is geometrically increased, and network information processing becomes efficient.
EDA technology is the latest modern electronic technology. To help electronic design engineers use computers to complete the automatic design of electronic systems, are engaged in the design of digital systems must master a technology, especially in the use of large-scale PLD (such as CPLD and FPGA) design of digital circuits, must use the means of EDA. EDA technology can help designers to complete a large number of auxiliary work.
Digital electronics in networking
The basic characteristics of digital electronics in the network
1, the network search and search with time
Search and search is the main role and function given to the network at the beginning of its emergence. The requirements for the concept of time are relatively low, and the network of time can be used to show other ways.
One is to use the correspondence characteristics of the network. The network content has the essential feature of correspondence; play the network content correspondence advantage to meet the basic requirements of people for the web;
Second, the network has open characteristics. The network world is all-encompassing. Not only can you find their information, but you can also use the interactive advantages of the network to find all the information content related to it, making the search content more integral features clear, providing people with the convenience of finding information quickly and effectively.
2、Multiple presentation forms of network information
The network information world is as wide as the sea, and the types and contents of information are also various. Text, video, audio, etc., can be an important part of the network information world.
When people use the Internet to find information resources, they can search for the resources they need independently according to their actual needs. Network information processing technology can also be used to integrate all kinds of information resources to form a graphic information presentation form, helping people to access the key points of information resources more directly and effectively and improve the utilization rate of information resources.
The role of digital electronics technology in the network
The network has been integrated into all aspects of people's production life, the choice and popularity of binary code, making the network connection more smooth, conversion more freely, computer technology and digital signal networking, and network intelligence and automation to enhance the degree of network information technology have played a positive role in promoting the development of progress. Specific embodiments are.
1, digital signal anti-interference ability
Digital signal anti-interference ability is an important factor affecting the quality of information conveyance, adding advantages to the quality of long-distance delivery of information. The use of digital electronics in the digital communication of signals can effectively prevent the interference of external sound on the transmission signal and realize the efficient transmission and acquisition of digital signal information.
2、Easy and safe digital signal storage
After the signal is converted into digital information, the encryption and decryption procedure of information becomes much simpler and more feasible after the simple mathematical operation, which can effectively solve the network information security problem that people generally care about nowadays, and improve the information encryption security setting at the same time, which is conducive to making the storage of digital information simple and easy, and can be freely transmitted and developed in the open network environment. development.
3、The advantages of digital signal equipment integration
Digital signal storage equipment towards integration is the main goal and direction of the current development progress of digital electronics technology, digital electronics technology in the circuit can effectively reduce the power of electronic operation, reduce the volume of information, the computer, and digital signal combination, can promote the degree of automation and intelligent level of communication network management, and further enhance the scale of the network integrated circuit.
Three digital electronics technology in the network application
Digital electronics technology has become an important, indispensable tool for production and life, both for the convenience of people's production and life and effectively promoting network technology's progress and development. In the entire network, applications play an extremely important content role, the key role in the network of important content, and the inevitable choice of modern technological progress and development.
Digital circuit signal processing is an important embodiment of modern technological progress and development. With the continuous maturation of network technology in the perfect, digital circuit signal processing technology advantages gradually highlighted and manifested, its advantages in signal processing are mainly realized.
First, the signal processing process is simple and easy. The specific signal processing procedure is to convert the analog signal into a digital signal. In the digital signal system, for its proper processing, the digital signal processing signal code is converted to an analog signal according to the realization of the needs of different people, selective output with information content.
Second, digital electronics technology gives full play to the role of a powerful digital circuit signal function, which is the key content of the information processing work process. In the digital era of continuous improvement and progress in the background, digital electronics technology in various fields gradually began to play a key advantageous role.
2、Network signal processing
The application of digital electronics technology to the network can effectively carry out the processing and development of network signals. Based on the binary code, the basic form of digital signal realization can provide convenience for the digital circuit processing process and targeted operation process. Digital signals have a strong ability to interfere with information and will not change because of external interference. Therefore, people in production life use the scope and frequency of large and wide practical applications of the degree of universality is extremely high.
3、Signal digital processing
Digital signal processing mainly uses random sampling, quantization and coding, and other operational links. Random sampling refers to the information processing process that will be scattered analog signal processing; quantization is to disrupt the existing signal continuous value order and change into the appropriate decomposition of the value order.
Coding is to edit and integrate the existing design scheme and the digital objects that can be continuous with it, enhance the processing effect of the time role of digital electronics and high energy chips between data, convert the digital signal into the data stream value that people need for production and life, and effectively complete the processing and development of digital signals.
After the signal digitization process, the digital signal can be effectively transmitted and spread in various cables and unlimited transmission channels to improve the speed of digital signal processing and transmission.
The development trend of digital electronics technology
1, the future development trend of digital electronics technology
Along with the development of modern technology, the advent of the information age, the development of society to bring a great impetus to electronics technology, to promote the rapid development of electronics technology and innovation, digital electronics technology will become the main force of future social and economic development. Social production needs will promote the more in-depth development of information technology.
The continuous renewal of information technology will require digital electronics to meet the corresponding market requirements. Digitization will become the future of electronics technology must go through.
Modern electronic products are being updated at an unprecedented rate, and behind these updates is the continuous development of programmable control devices. At this stage in the semiconductor process level has reached a deep sub-micron level, the chip gigabit highly integrated, it is destined to digital electronics technology will be more and more towards a higher and more integrated direction, SOC system-on-a-chip will become the future development trend of integrated circuit technology.
2, the integration of digital and analog electronics technology
The future development trend of electronic technology will be the integration of digital and analog electronics, which will promote the generation of new electronic devices, there will be more high-performance electronic devices to meet the needs of future production and life.
The conversion process between analog and digital signals is mainly carried out in the sensor and the analog signal in the whole conversion process. Through the sensor filtering and other operations, until the end of the operation, the analog signal will be converted into a digital signal.
The combination of digital and analog electronics will make the performance of traditional electronic devices greatly improved by changing the structure and function of traditional electronic devices to change the inherent defects of traditional electronic devices and improve their performance of electronic devices. The combination of digital and analog new electronic devices will help the future development of science and technology.
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