Author Archives: allaismt

Nowadays, with the rapid update of electronic products, the printing of PCB has expanded from single-layer board to double-layer board and multi-layer board with more complicated requirements for high precision. Therefore, there are more and more processing requirements for PCB holes, for example, the hole diameter is getting smaller and smaller, and the distance between […]

With the progress of society and the development of science and technology, new electronic products are constantly emerging, which makes the application field and market of printed circuit board (PCB) products constantly expanding, and at the same time, the demand for electronic information processing of all kinds of products is gradually increasing. When the demand […]

In PCB circuit design, there will be times when IC needs to be replaced. Here’s to share the skills of IC replacement, so as to help designers to be more perfect in PCB circuit design. Direct substitution Direct replacement refers to the direct replacement of the original IC with other IC without any change, which […]

Digital system designers may be familiar with some RF components and wiring styles, but there is more to RF circuit design. RF circuits can include integrated circuits, discrete semiconductors, and printed RF components, which work together to produce desired functions. RF circuit design involves combining all these elements to build the whole system and create […]

Printed circuit board (PCB) wiring plays a key role in high-speed circuits, but it is often one of the last steps in the circuit design process. There are many problems in high-speed PCB wiring, and many literatures have been written on this topic. This paper mainly discusses the wiring problem of high-speed circuits from a […]

1.PCB VS flexible printed circuit board PCB is one of the important electronic components in the electronic industry. Almost every kind of electronic equipment, such as electronic watches, calculators, computers, communication electronic equipment, military weapon systems, etc., as long as there are electronic components such as integrated circuits, all need to use printed boards for […]

PCB via problem phenomenon description During the trial production of the new intelligent conference equipment samples produced by circuit R&D, when the samples were subjected to strict aging test and the system performance test, it was found that two devices were disconnected (abnormal communication), accounting for 4% of the total tested products. After analysis, it […]

1. Ground wire layout: 1. Digital ground is separated from analog ground. 2. The grounding wire should be as thick as possible, so that it can pass at least 3 times the allowable current on the printed circuit board, generally 2~3mm. 3. The ground wire should constitute an infinite loop as far as possible, so […]

Some STM32 application customers who use external SDRAM reflect that in EMC test, the radiation interference caused by SDRAM signal exceeds the standard. If the chassis can’t shield the radiation interference in the terminal products, then this kind of problem often needs to be solved by modifying the PCB design of SDRAM signal. Here, how […]

When PCB is to be processed by SMT, PCB is transported by guide rail on SMT production line. Therefore, a pair of edges of forbidden cloth elements must be reserved as transport edges. Usually, the two long sides of the PCB or the rear panel of the jigsaw puzzle are used as its conveying edges. […]