When pcb layout of circuit components, it is necessary to meet the requirements of anti-interference design

1. Arrange the position of each functional circuit unit according to the circuit process, so that the layout is convenient for signal circulation, and the signal keeps the same direction as much as possible.

2. Take the core components of each functional circuit as the center and make layout around them. Components should be evenly, neatly and compactly arranged on the pcb. Minimize and shorten leads and connections between components.

3. For circuits operating at high frequencies, the distribution parameters between components should be considered. In general circuits, components should be arranged in parallel as much as possible. This is not only beautiful, but also easy to install and weld, and easy to mass produce.

4. Components located on the edge of the circuit board are generally not less than 2mm away from the edge of the circuit board. The best shape for a circuit board is a rectangle. The aspect ratio is 3:2 or 4:3. When the surface size of the circuit board is larger than 200×150mm, the mechanical strength of the circuit board should be considered.