In the process of PCB design, if possible risks can be predicted and avoided in advance, the success rate of PCB design will be greatly improved. Many companies will have an indicator of the success rate of PCB design when evaluating projects.
The key to improve the success rate of a board lies in the signal integrity design. At present, there are many product schemes for electronic system design, and chip manufacturers have already made them, including what chips to use, how to build peripheral circuits, and so on. Most of the time, the hardware engineer hardly needs to consider the circuit principle, but only needs to make the PCB himself.
But it is in the process of PCB design that many enterprises encounter difficulties, either the PCB design is unstable or it doesn’t work. For large enterprises, many chip manufacturers will provide technical support to guide PCB design. However, it is difficult for some small and medium-sized enterprises to get this support. Therefore, we must find a way to finish it by ourselves, which leads to many problems, which may require several editions and debugging for a long time. In fact, if you know the design method of the system, these can be completely avoided. Next, let’s talk about three techniques to reduce the risk of PCB design.
1. In the system planning stage, it is best to consider the signal integrity. If the whole system is built like this, can the signal be received correctly when it is transmitted from one PCB to another? This needs to be evaluated in the early stage, but it is actually not very difficult to evaluate this problem. Knowing a little about signal integrity can be done with a little simple software operation.
2. In the process of PCB design, use simulation software to evaluate the specific wiring and observe whether the signal quality can meet the requirements. This simulation process itself is very simple, and the key is to understand the principle knowledge of signal integrity and use it for guidance.
3. In the process of making PCB, risk control must be carried out. There are many problems, which can’t be solved by the simulation software at present, and must be controlled by the designer. The key of this step is to know where there will be risks, how to avoid them, and what is needed is signal integrity knowledge.
If these three points can be well grasped in the process of PCB design, the risk of PCB design will be greatly reduced, the probability of error will be much smaller after the board is printed, and debugging will be relatively easy.
