How to effectively take anti-interference measures for flexible circuit board?

How to effectively take anti-interference measures for flexible circuit board?

PCB manufacturers, PCB designers and PCBA manufacturers explain to you how to effectively implement anti-interference measures for flexible circuit boards?

Flexible Printed Circuit Board (FPC) is referred to as "flexible board", commonly known as FPC in the industry. It is a flexible insulating substrate (mainly polyimide or polyester film) The printed circuit board has many advantages that the hard printed circuit board does not have. For example, it can bend, wind and fold freely. The volume of electronic products can be greatly reduced by using FPC, which is suitable for the development of electronic products in the direction of high density, miniaturization and high reliability. Therefore, FPC has been widely used in aerospace, military, mobile communications, laptops, computer peripherals, PDAs, digital cameras and other fields or products.

The anti-interference ability of PCB will affect the effective performance of electronic equipment, and the anti-interference ability of PCB is closely related to the specific circuit. Then, how to effectively take anti-interference measures for PCB?

1. Ground wire design principle: if there are both logic circuits and linear circuits on the Flexible circuit board, they should be separated as far as possible; The grounding of low-frequency circuit shall adopt single point parallel grounding as far as possible. If the actual wiring is difficult, part of the circuit can be connected in series and then connected to the ground in parallel.

   
   

2. The grounding wire forms a closed loop: the flexible circuit board composed of digital circuits only, and its grounding circuit is arranged into a group loop, which can mostly improve the anti noise ability.

3. On the premise that the speed can meet the requirements, reduce the crystal oscillator of the single chip microcomputer as much as possible and select the low-speed digital circuit.

4. IC devices shall be directly welded to the circuit board as much as possible, and IC sockets shall be used less.

In order to obtain better performance of electronic circuits, the Layout of components and wires should be just right. In addition, the size of each PCB must be considered. After determining the PCB size, determine the position of special components. Finally, according to the function of the circuit, it is the best choice to layout all the components of the circuit.  

5. To make the electronic circuit obtain better performance, the layout of components and wires should be just right. In addition, the size of each flexible circuit board shall be considered. After determining the PCB size, determine the position of special components. Finally, according to the function of the circuit, it is the best choice to layout all the components of the circuit.

PCB manufacturers, PCB designers and PCBA manufacturers explain to you how to effectively implement anti-interference measures for flexible circuit boards?