In the process of layout, comprehensive consideration should be given to the mechanical structure, heat dissipation, electromagnetic interference, convenience of future wiring, and aesthetics.įirst of all, before layout, the entire circuit is divided into functions. Improve the reliability and effectiveness of circuit work.
It requires that the person who lays out must have rich experience in high-speed PCB manufacturing, so as to avoid detours in the design process. The complex environment of high-frequency PCB makes the layout design of the high-frequency system difficult to use the learned theoretical knowledge. In the PCB design of the circuit, the layout is an important link, and the result of the layout will directly affect the effect of the wiring and the reliability of the system, which is the most time-consuming and difficult in the entire printed circuit board design. In order to design a high-speed PCB circuit board that can work reliably, it is necessary to fully and carefully consider the design, solve some unreliable problems that may arise during layout, shorten the product development cycle, and improve market competitiveness. Based on the transmission line model, to sum up, the transmission line will bring adverse effects such as signal reflection, crosstalk, electromagnetic interference, power supply and ground noise to the circuit design. Incorrect layout of termination components or incorrect wiring of high-speed signals will cause transmission line effect problems, which will cause the system to output incorrect data, and the circuit does not work properly or even does not work at all. In high-speed circuit design, the inductance and capacitance on the circuit board will make the wire equivalent to a transmission line.
With the large-scale increase in the design complexity and integration of electronic systems, clock speeds and device rise times are getting faster and faster, and high-speed circuit design has become an important part of the design process. The results show that the design shortens the product development cycle and enhances market competitiveness.
Discuss some layout and wiring related principles that need to be paid attention to in the process of using PROTEL design software to realize high-speed circuit PCB design, and provide some practical and proven high-speed circuit layout and wiring techniques to improve the reliability of high-speed circuit board design Sex and effectiveness.