Analysis of traditional PCB design methods

The traditional pcb design goes through the process of schematic design, layout design, pcb production, measurement and debugging.

In the schematic design stage, due to the lack of effective analysis methods and simulation tools, it is required to pre-analyze the transmission characteristics of the signal on the actual PCB. Generally, the schematic design can only be carried out by referring to the component data sheet or past design experience. . For a new design project, it may be difficult to make the correct choice of component parameters, circuit topology, network termination, etc. according to the specific situation.

In the pcb layout design, there is also a lack of effective means to make real-time analysis and evaluation of the impact of stack-up planning, component layout, wiring, etc., so the quality of layout design usually depends on the designer's experience.

In the traditional pcb design process, the performance of the pcb can only be assessed after the fabrication is complete. If it cannot meet the performance requirements, it needs to be tested many times, especially the parameters in the schematic design and layout design that are difficult to quantify need to be repeated many times. In the case of higher and higher system complexity and shorter design cycle requirements, it is necessary to improve the design method and process of PCB to meet the needs of modern high-speed system design.