What is an excellent PCB design? Let’s talk about the working methods and working habits during design, which will make your design more reasonable, easier to produce, and better in performance. 1 Production requirements The requirements for board material, board thickness, copper thickness, process, solder mask/character color, etc. are clear. The above requirements are the…
This article interprets the four basic characteristics of RF circuits from four aspects: RF interface, small desired signal, large interference signal, and interference from adjacent channels, and gives important factors that need special attention in the PCB design process. RF interface of RF circuit simulation Conceptually, wireless transmitters and receivers can be divided into two…
With the vigorous development of the PCB industry, more and more engineering and technical personnel have joined the design and manufacture of PCBs. However, since PCB manufacturing involves many fields and a considerable number of PCB design engineers (Layout personnel) have not engaged in or participated in the production and manufacturing process of PCBs, the…
Everyone knows that making a PCB board is to turn the designed schematic diagram into a real PCB circuit board. Please don’t underestimate this process. There are many things that work in principle but are difficult to achieve in engineering, or things that others can achieve but others can’t. Therefore, it is not difficult to…
As an electronic engineer, designing circuits is a necessary hard work. However, no matter how perfect the principle design is, if the circuit board design is unreasonable, the performance will be greatly reduced, and in serious cases, it may not work properly. Based on my experience, I have summarized the following points that should be…
This paper discusses some layout and wiring related principles that need to be paid attention to in the process of using PROTEL design software to realize high-speed circuit printed circuit board design, and provides some practical and verified high-speed circuit layout and wiring technologies to improve the reliability and effectiveness of high-speed circuit board design….
Correctly Design the BGA Package Ball Grid Array (BGA) is becoming a standard packaging form. People have seen significant results using BGAs with a pitch of 0.05 to 0.06 inches. The next step in packaging evolution is likely to be chip-scale packaging (CSP), which is smaller and easier to process. BGA design rules Bump slump…
There are many ways to solve EMI problems. Modern EMI suppression methods include: using EMI suppression coatings, selecting appropriate EMI suppression parts and components, and EMI simulation design. This article starts from the most basic PCB layout and discusses the role and design techniques of PCB layer stacking in controlling EMI radiation. Power bus Reasonably…
Grounding is one of the important means to suppress electromagnetic interference and improve the electromagnetic compatibility of electronic equipment. Correct grounding can not only suppress the influence of interference, but also suppress the interference radiated by the equipment; on the contrary, incorrect grounding will introduce serious interference and even make the electronic equipment unable to…
(1) Talking about efficiency must start with management Among SNIT equipment, the SMT machine is recognized as the most complex equipment. With the rapid development of assembly technology, its complexity will continue to increase. At the same time, since the cost of the SMT machine accounts for a considerable proportion of the entire SMT processing,…
When we design the circuit board, the circuit principle is well designed, even excellent. However, various noises will appear during the debugging process, and the circuit board cannot achieve the expected purpose. Sometimes, even worse, the board has to be re-layed (although I have not encountered it, but I have encountered more than one or…
My understanding: Hardware design is to complete hardware products (note: products, not development boards) that meet the requirements of PRS (Product Requirement Specification) and COGS (Cost of Goods Sale) within the specified time using the current mature chip solutions or technologies in the industry, including functions, performance, power supply, power consumption, heat dissipation, noise, signal…
The general surface treatment of PCB includes tin spraying, OSP, immersion gold, etc. The “surface” here refers to the connection points on the PCB that provide electrical connections between electronic components or other systems and the circuits of the PCB, such as pads or contact connections. Bare copper itself has good solderability, but it is…
Power bus Reasonably placing capacitors of appropriate capacity near the power pins of IC can make the jump of IC output voltage faster. However, the problem does not end there. Due to the limited frequency response characteristics of capacitors, capacitors cannot generate the harmonic power required to drive IC output cleanly over the full frequency…
1.Digital ground and analog ground Let me quote Zhou Wei’s article again: All electrical equipment with voltage level as working characteristic needs a reference, that is to say, the voltage level is relative to this reference, and this reference is 0v in most cases. In the end, everyone agreed to call this 0v reference “ground”….
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