It is a welding method that the welding end face of the components and the PCB welding pad are coated with paste solder and assembled together, heated until the solder is melted, and then the welding area is cooled.
Reminder: Try to provide a special wiring layer for key signals such as clock signals, high-frequency signals, and sensitive signals, and ensure its minimum loop area. The signal quality is guaranteed by means of shielding and increasing safety distance.
There are several categories of transmission line technology, the earliest transmission line is the coaxial transmission line invented by Oliver Heaviside to solve the long-distance transmission problem of the telegraph at that time, and the common forms
Avoid the concentration of hot spots on the PCB, distribute the power evenly on the PCB board as much as possible, and maintain the uniform and consistent temperature performance of the PCB surface. It is often difficult to achieve strict uniform distribu
The design process begins with circuit design. The first thing you need to do is take out a document called a schematic. You can think of it as a blueprint that shows all the components and how they communicate in detail.You can design circuits on a PC us
It has been measured that a pass hole can bring about 0.5pf of distributed capacitance, resulting in a significant increase in the delay of the circuit, and reducing the number of pass holes can significantly improve the speed
Cross-segmentation may not be relevant for low-speed signals, but in high-speed digital signal systems, high-speed signals take the reference plane as the return path, that is, the return path. When the reference plane is incomplete, he following adverse
Long track and zigzag track will affect the signal quality, resulting in signal distortion and interference. In order to avoid this situation, it is necessary to avoid the occurrence of too long and too curved. For some lines that need to be bent, excessi
Easy to manage circuit board components For a large led circuit board, it has a lot of parts package, there are thousands of networks, very messy, the use of the class can be very convenient to manage the circuit board.
The frequency of the digital circuit is high, the sensitivity of the analog circuit is strong, for the signal line, the high-frequency signal line is as far away from the sensitive analog circuit device as possible, for the ground line, the whole PCB has
Maintenance of spare printed circuit board. For the spare printed circuit board that has been purchased, it should be installed on the numerical control device regularly and run for a period of time to prevent damage;
In principle, right-angle wiring will cause the line width of the transmission line to change, resulting in impedance discontinuity. In fact, not only right Angle wiring, ton Angle, acute Angle wiring may cause impedance changes.
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