Circuit Design Method Principles

With the continuous development of the electronic industry, electronic products emerge in endlessly. In the production process of electronic products, the design of electronic circuits is very important, which greatly affects the performance of products. Therefore, when designing electronic circuits, it is necessary to follow certain design principles and adopt appropriate design methods. Only in this way can we ensure the scientificity of circuit design and the performance and quality of electronic products.

1. Principles of electronic circuit design

1. The principle of integrity: When designing an electronic circuit, it is necessary to start from the whole and focus on analyzing the relationship between the components in the electronic circuit, as well as the relationship between the electronic circuit as a whole and the external environment. It is necessary to fully grasp the overall nature of electronic circuits, determine the types of electronic circuits, clarify the functions to be realized and the measures to be taken to realize these functions, and then determine the overall design of electronic circuits. The principle of integrity needs to be established on the basis of comprehensive control and guidance: first, electronic circuit analysis must be based on synthesis as the premise, and synthesis should be the ultimate goal. Designs that do not consider synthesis are incomplete and unreasonable; Second, the synthesis is composed of multiple small synthesis, so the analysis process needs to inspect each part of the circuit separately, and then conduct an overall evaluation; third, only after a sufficient analysis of the electronic circuit can the synthesis be performed. Based on analysis, synthesis without analysis will inevitably add subjective components, which will bring deviations to the design of electronic circuits.

2. Functional principle: complex large circuits can be divided into smaller circuit subsystems with different levels. When designing, larger-scale circuits should be refined first and divided into subsystems with independent functions. , and then use it as a functional module, determine the function type of each module and realize the functional requirements of each module, then select the specific circuit, determine how to select the appropriate electronic components, determine the use parameters of each component, and finally realize the design of the circuit subsystem Finish.

3. The principle of optimization: The principle of optimization is a basic principle of electronic circuit design. Because of the defects of the electronic components themselves or some problems in the mutual cooperation of electronic components and functional modules, the functions of the electronic circuits cannot be fully realized, which requires certain design principles, design methods, and design steps. , starting from the adjustment of each component or each functional module, through calculation, the optimized parameter index is obtained, and the related components or modules are adjusted according to the calculation results, so that the entire circuit can achieve the goal of optimization.

4. The principle of reliability and stability: Electronic circuits play a vital role in electronic equipment. The stability and reliability of electronic circuits will greatly affect the use and service life of electronic equipment. Electronic circuits The stability of the circuit is closely related to the form of the circuit and the selection of electronic components. In order to ensure the stability of the electronic circuit, the following principles should be followed: on the premise of ensuring the performance and function of the system, the structure of the electronic circuit should be simplified as much as possible. ; It is necessary to reasonably divide the functions of software and hardware, follow the principle of replacing hardware with software, and realize the complementarity of software and hardware; try to use digital circuits to replace analog circuits, because there are many factors that affect electronic circuits and are more complicated, and the time of occurrence and frequency are also unpredictable. Therefore, when designing, it is necessary to take effective protection measures against potential unstable factors. Anti-jamming technology or fault-tolerant technology are often used to prevent or reduce the circuit due to Interference caused by unstable factors.

5. The principle of performance and price ratio: In the context of today's competition in the electronics industry, electronic products are required to have a short development and design cycle, and to ensure that the product has excellent performance and stability during use. Therefore, in order to improve the competitiveness of enterprises, the economy, advancement and operability of products must be guaranteed in the design of electronic products.

2. Design method of electronic circuit

1. Hierarchical design method

Electronic circuit design can generally be divided into three levels: the first level is the top level, which is oriented to the entire system when designing, and is a description of the overall function of the system; the second level is the middle level, which is oriented to the circuit level when designing; The third layer is the bottom layer, which faces the physical realization level when designing, and is the smallest design unit. There is no requirement for the specific design sequence, and it can be freely developed by the staff.

2. Incremental design method

The progressive design method is suitable for application-type circuits. When designing, it is necessary to understand the specific requirements first, then design the drawings, then analyze the working principle on the basis of the drawings, and design the basic circuit units. Debug and optimize the design of the basic circuit unit, and finally realize the design of the entire circuit.

3. Hardware description language design method

The hardware description language design method is a relatively advanced circuit design method, and its essence is electronic design automation. When using this method for design, it is first necessary to analyze the requirements of the project, and then formulate an overall plan that can meet the requirements. Then design the electronic circuit according to the overall plan, and test the rationality and scientificity of the circuit design through simulation. Finally, combine the basic circuits, and then perform unified adjustment and optimization, and finally achieve a more reasonable circuit design.

4. Optimal design method

There are many types of electronic products, and the circuit design methods are also various, and it is difficult to adjust circuits such as integrated circuits after they are manufactured. Therefore, when designing circuits, attention should be paid to precision control. Computer assistance can be used. The program applicable to this circuit realizes the optimization of each parameter of the circuit and completes the design of the circuit.

3. Circuit design steps

(1) Clarify the design requirements of the circuit: There are various forms of circuit design. When designing, it is first necessary to clarify the type of electronic product, then determine the design requirements of the circuit, and design the circuit according to the requirements.

(2) Design the schematic diagram of the circuit: After clarifying the design requirements of the electronic circuit, it is necessary to design the schematic diagram of the circuit.

(3) Check the circuit and select components: After completing the design of the circuit schematic diagram, it is necessary to check the rationality of the schematic diagram, examine its output power and signal voltage method multiples, and determine whether it meets the basic requirements of the circuit design. After the checking and calculation work is completed, it is necessary to select the components required for the circuit, focusing on the maximum power and signal current that the components can withstand to ensure the rationality of the selection.

The above are the principles and methods of electronic circuit design introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have software and hardware function development needs for smart electronic products, you can rest assured to entrust them to us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. We have hardware design and software development capabilities. Covering circuit design, PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development, voice recognition technology, Bluetooth wifi development, etc. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS solutions, the development of Bluetooth audio, the development of children's toys, and the development of electronic education products.