Pcb design considers three key

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/ 2019-04-29 / Tech

1. Draw a schematic diagram

Many engineers feel that the layout work is more important. The schematic diagram is for the purpose of generating a netlist for PCB inspection. In fact, the schematic diagram will be more important in the subsequent circuit debugging process. Whether it's finding a problem or communicating with a colleague, the schematic is more intuitive and convenient. In addition, develop the habit of making annotations in the schematic diagram, and mark the problems that should be noticed when the various parts of the circuit are laid out on the schematic diagram, which is a good reminder to yourself or to others. The hierarchical schematic diagram divides the circuits of different modules with different functions into different pages, so that the workload can be significantly reduced whether it is read or reused. Using a mature design is always less risky than designing a new circuit. Every time I see that all the circuits are placed on a single sheet of paper, a dense piece of equipment, the head can be a big circle.

pcb design considers three key points

2. Well circuit layout

Anxious engineer After drawing the schematic diagram and importing the netlist into the PCB, you can't wait to put the device in place and start to pull the cable. In fact, a good PCB layout can make the cable work behind you easier and make your PCB work better. The board will have a signal path, and the PCB layout should also follow this signal path as much as possible so that the signal can be transmitted smoothly on the board. People don't like to go through the maze, and the signal is the same. If the schematic is designed according to the module, the PCB is the same. Yes, according to different functional modules, the board can be divided into several areas. The analog numbers are separated, the power signals are separated, the heating device and the susceptible device are separated, and the larger device is not too close to the board edge, pay attention to the shielding of the RF signal, etc. spend a little more time optimizing the layout of the PCB,It will save more time when pulling the cable.

3, learn to set the rules

In fact, now not only advanced PCB design software needs to set the wiring rules, some simple and easy to use PCB tools can also be set rules. After all, the human brain is not a machine, and it is inevitable that there will be negligence and mistakes. So put some easy to ignore problems into the rules, let the computer help us check, try to avoid making some low-level mistakes. In addition, the perfect rule setting can better regulate the work behind. The so-called sharpening of the knife does not mistake the woodworker, the more complicated the scale of the board, the more important the importance of the rule setting. Many EDA tools now have an automatic routing function. If the rules are set in enough detail, let the tools help you design them yourself. Isn't it a more pleasant thing to have a cup of coffee?

Keywords: Pcb PCB design
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