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support@nextpcb.comHere you'll find insights into PCB design, tech trends, assembly issues, and trending topics
in the general news media as they relate to printed circuit board technology.
As experts in the manufacture and assembly of printed circuit boards, we work to make our blog a helpful resource on PCB topics and the industries that we work with, including automotive, consumer electronics, aerospace and many more.
Basic grounding method: There are three basic grounding methods in electronic equipment: single-point grounding, multi-point grounding, and floating ground.
75. -48V to -48V signal is only the return flow, there is no convergence to other places? If you can not, please explain the reason in the remarks column.
Routing is the overall requirement for high-frequency PCB design based on a reasonable layout. Wiring includes both automatic routing and manual routing. Generally, regardless of the number of critical signal lines, these signal lines are manually wired first. After the wiring is completed, these signal lines are carefully inspected, fixed after inspection, and then automatically routed to other wirings. That is, the combination of manual and automatic wiring is used to complete the wiring of the PCB.
How to define differential pairs in the schematic
There are many ways to solve EMI problems. Modern EMI suppression methods include using EMI suppression coatings, selecting appropriate EMI suppression parts, and EMI simulation design. This article starts with the most basic PCB layout and discusses the role of PCB layered stacks in controlling EMI radiation and design techniques.
Analyze the differences and how to use Fill, Polygon Pour, Plane in Altium Designer
One of the two necessary conditions for data transmission: the data at the input of RECEIVER generally has the required setup time Tsetup, which means that the data must be valid before the minimum time valid for the clock, and the time at which the data signal arrives at the input should be early enough. At the clock signal, the inequality satisfied by the settling time can be derived.
At the moment, users most need a tool that combines timing analysis and SI, and the interface is optimized for easy setup and includes Design KIT.
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Protel for Windows should pay attention to the problem when switching to Gerber. Protel for DOS should turn attention to the problem Gerber. 3. PowerPCB should pay attention to the problem when transferring to Gerber.4. PADS should pay attention to the problem when transferring to Gerber.
Which method do you know below to reduce noise and electromagnetic interference in PCB design?
Layout is one of the most basic job skills for PCB design engineers. The quality of the traces will directly affect the performance of the entire system. Most of the high-speed design theories will eventually be implemented and verified through Layout. It can be seen that wiring is critical in high-speed PCB design. The following will analyze the rationality of some situations that may be encountered in actual wiring, and give some comparatively optimized routing strategies. Mainly from the right-angle routing to elaborate.
The transmission rate of high-speed PCB design and cabling systems is steadily accelerating, and it also brings about some kind of anti-jamming vulnerability. This is because the higher the frequency of transmitting information, the higher the sensitivity of signals, and the lower and higher the power of their signals. The wiring system at this time is more susceptible to interference. Interference is ubiquitous. Cables and equipment can interfere with other components or be severely disturbed by other sources of interference, such as: computer screens, mobile phones, motors, radio transmission equipment, data transmission, and power cables. In addition, potential eavesdroppers, cybercriminals, and hackers continue to increase because of their enormous damage and loss to UTP cable information interception.
First, the appearance should not only consider the neat and orderly placement of components, but also consider the beautiful and smooth lines.
Different methods must be used according to different components to judge whether the components are normal or not.
In order to perform circuit simulation, it is necessary to first build a model of the component, that is, for the various components supported by the circuit simulation program, there must be a corresponding mathematical model to describe them in the simulation program, that is, a calculation formula that can be calculated by a computer. To express them.
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Since SMT generally uses infrared furnace heat flow welding to achieve component soldering, the layout of the components affects the quality of the solder joints, which in turn affects the yield of the product. For the design of RF circuit PCB, electromagnetic compatibility requires that each circuit module does not generate electromagnetic radiation as much as possible, and has certain anti-electromagnetic interference capability. Therefore, the layout of components directly affects the interference and anti-interference ability of the circuit itself. This is also directly related to the performance of the designed circuit.
PCB layout is the most important step in the design of electronic products. PCB layout and wiring will directly affect the performance of the circuit. Nowadays, although there are many softwares that can realize automatic PCB layout and routing, as signal frequencies continue to increase, engineers often need to understand the basic principles and techniques of PCB layout and routing to make their design perfect.
The so-called source synchronization means that the clock strobe signal CLK is transmitted by the driver chip along with the transmission data, and it does not use an independent clock source like the common clock synchronization. In the source synchronous data transceiving, the data is first sent to the receiving end, and the strobe clock is sent to the receiving end for sampling and latching the batch of data after a short time. The schematic diagram is shown in Figure 2. The timing analysis of source synchronization is simpler than the synchronization of common clocks. The analysis methods are very similar. The analysis formula is directly given below:
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