1.Direct replacement Direct replacement means directly replacing the original IC with other ICs without any modification, and the replacement does not affect the main performance and indicators of the machine. The replacement principle is: the functions, performance indicators, packaging form, pin usage, pin number and interval of the replacement IC are the same. The same…
If the wiring does not require an extra layer, why use it? Wouldn’t reducing the layer make the board thinner? Wouldn’t the cost be lower if the board had one less layer? However, in some cases, adding a layer would reduce the cost. There are two different structures of PCB boards: core structure and foil…
(1) High-frequency circuits are often highly integrated and have high wiring density. The use of multilayer boards is necessary for wiring and is also an effective means to reduce interference. (2) The fewer bends in the leads between the pins of high-speed circuit devices, the better. It is best to use all-straight lines for the…
In the research of PCB reverse technology, reverse schematic diagram refers to reversely deducing the PCB circuit diagram based on the PCB file diagram or directly drawing the PCB circuit diagram based on the actual product, aiming to explain the principle and working condition of the PCB board. In addition, this circuit diagram is also…
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After the PCB design is completed, it needs to be output to the board factory for processing, production, patching, and assembly. Faced with the fierce market competition trend, the cost of PCB circuit board materials is also on the rise. More and more manufacturers are monopolizing the market with low prices in order to enhance…
1.Laminate process reasons: Under normal circumstances, as long as the high temperature section of the laminate exceeds 30 minutes, the copper foil and the prepreg are basically completely combined, so the pressing generally does not affect the bonding strength between the copper foil and the substrate in the laminate. However, during the lamination and stacking…
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Detection Circuit in PCB Reverse Design System 1 Introduction When electronic engineers are performing reverse design or repair work on electronic equipment, they first need to understand the connection relationship between the components on the unknown printed circuit board (PCB), so they need to measure and record the connectivity relationship between the pins of each…
Introduction High-speed PCB crosstalk analysis and minimization 1.Introduction With the increasing complexity and performance of electronic products, the density of printed circuit boards and the frequency of related devices are constantly rising. Maintaining and improving the speed and performance of the system has become an important issue for designers. The higher the signal frequency, the…
Via is one of the important components of multi-layer PCBs. The cost of drilling holes usually accounts for 30% to 40% of the cost of PCB board manufacturing. Simply put, every hole on a PCB can be called a via. From the perspective of function, vias can be divided into two categories: One is used…
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