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Vias are one of the important components of multilayer printed circuit boards. The cost of drilling usually accounts for only 30% to 40% of the proofing cost of printed circuit boards. From this point of view, it is divided into two parts: a small part as the electrical connection between the layers; The other part […]

Why do I tell you again and again: don’t find those allegro factories to make multilayer boards! Don’t look for allegro factories to make multilayer boards! ! Don’t look for allegro factories to make multilayer boards! ! ! The reason why I am so determined is not because Allegro factory is not good for them, […]

“PCB is the provider of electrical connection of electronic components, and the layout of components is very important in PCB design, which will affect the final performance of products. If the layout and arrangement of components are unreasonable, the electrical and mechanical properties of the products will decrease, and it will also bring inconvenience to […]

The development of modern science and technology leads to the miniaturization of electronic components and the extensive application of SMT technology and equipment in electronic products. SMT manufacturing device has the characteristics of full automation, high precision and high speed. With the improvement of automation, higher requirements are put forward for PCB design. The PCB […]

Cadence Allegro has almost become the actual industry standard in high-speed board design, and the latest version is Allegro 16.5. Combined with its front-end product Capture, it can complete high-speed, high-density and multi-layer complex PCB design and wiring. 01 Q: What problems should be paid attention to when wiring high-frequency signals? A: impedance matching of […]

To make a long story short, it’s not easy to make a good impedance board! Some model factories give several fixed laminated structures, and then let customers calculate their impedance according to their lamination … To be honest, Xiaobian really wants to swear at these board factories! If you can’t do it, you can’t! How […]

In this article, the topology of buck, boost and buck-boost will be introduced from different aspects. Step down converter Figure 1 is the schematic diagram of asynchronous buck converter. The buck converter reduces its input voltage to a lower output voltage. When the switch Q1 is turned on, the energy is transferred to the output […]

With the continuous development and progress of electronic product technology, electronic products are gradually developing towards light, thin, small, personalized, highly reliable and multi-functional. Aluminum substrates and copper substrates are born in compliance with this trend. So, what is the difference between aluminum substrate and copper substrate? Generally, the aluminum substrate is single layer, which […]

One of the main purposes of circuit schematic design is to provide a network list for the design of pcb, and to prepare for the design of PCB. The design process of multi-layer pcb is basically the same as that of ordinary PCB, but the difference is that the wiring of the intermediate signal layer […]

Although many customers and friends have been deeply involved in the electronic industry for many years, as the saying goes: there are specialties in the technical field! Perhaps you are not sure about the real quality of PCB. Xiaobian has been working in the PCB industry for ten years. Today, I will simply talk to […]