For circuits with large redundancy of power pins, the number of matched capacitors can also be calculated according to the number of output pins, and every 5 outputs is matched with a 100nf filter capacitor.
In the manufacture of high density packaging structure such as BGA for PCB raw materials technical requirements, special analysis should be carried out carefully, the selection of substrate and copper foil thermal expansion coefficient basically to match.
The above conclusions are similar when the power source ground distance is less than 10mil. However, when the power source is located at 20mil or even 50mil, the situation changes slightly. As shown in Figure 3, when the ground distance of the power suppl
PCB proofing is the basis of the mass production of circuit board products. It is important to save cost, improve design and break through innovation, so PCB proofing is an indispensable part of PCB batch processing.
The small circuit material on the surface of PCB board is copper foil. Originally, copper foil is covered on the whole board, but in the manufacturing process, the middle part is etched away, and the remaining part becomes a network of small lines.
In the typical radiation case of EMC testing and rectification, common-mode voltage parasitic between analog circuit and digital circuit is the main reason for the formation of common-mode radiation.
If the design rules do not meet the requirements of PCB manufacturing process, it will not only affect the function of the product so simple, even can not process can not realize the design intention of the engineer.
thanks to a deep control area and copper plating on the board, produced a bizarre scene during welding, where the board bubbled in layers. Is the processing of the design, or ignoring the welding process, please see today's case analysis.
High-speed public number are engaged in high-speed PCB design (Layout) of the small partner, signal processing theory may not help these friends in their daily work is not too much, these friends may pay more attention to the topic related to wiring.
Many manufacturers need to customize antenna products to ensure strong signal and stable signal. For antenna customization, we need to pay attention to many details in order to customize the best solution.
If the two reference planes (i.e. the path where the signal returns) have the same potential and the two layers are joined together multiple times through the holes, then the specified return path will have a small loop area. This is the design we wanted.
Once a PCB laminate problem is encountered, it should be considered to add to the PCB laminate material specification.
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