Author Archives: allaismt

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 […]

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. […]

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 […]

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 […]

When I once saw the PCB of the computer motherboard, I thought how great it was to draw it myself. Later, when I came into contact with protel99se, I stepped into the team of drawing boards, and then altium, cadence and so on. With the accumulation of experience in drawing boards, more and more matters […]

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 […]

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 […]

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 […]

High-precision PCB refers to the adoption of technologies such as fine line width/spacing, tiny holes, narrow ring width (or no ring width) and buried and blind holes to achieve high density. And high precision means that the result of “thin, small, narrow and thin” will inevitably bring high precision requirements. Take the line width as […]

Matters needing attention in the design of the clock on the circuit board are mainly considered from three aspects. 1. PCB layout 1) the clock crystal and related circuits should be arranged in the center of the PCB with a good stratum, not near the I/O interface. The clock generation circuit can not be made […]