Engineering mistakes can never be avoided. Don't be silly to believe that those mistakes stand for low level or void of excellence in PCB design capability. However, most of mistakes engineers tend to make derive from their excessive considerations in terms of system efficiency, signal integr

With constant development of information technology, electronic products are becoming increasingly complicated in terms of their functions, categories and structures, driving PCB design towards direction of multiple layers and high density. As a result, much attention has to be paid on EMC (Elec

High-speed signals is a hot topic that can't be avoided by communication industries. With the increase amount of transmitted information and transmission speed rate, high-speed signals have gradually become significant. High-speed PCB is a loading board of high-speed signals and its material

Insulation Description In the ordinary 380V AC distribution system, control power supply usually derives from DC power system. As a critical standby power supply and control power supply of power plants, the most ordinary and dangerous defect of DC system lies in DC grounding defect. Based on

Up to now, smart phones have become such a must-have electronic product that more than one third of daily communications and activities are completed through smart phones with their value rapidly rising every year. It's estimated that mobile phones featuring language will be decreased as a ra

Influence of Relative Delay on Signals Signals transmitted in differential signal lines contain differential mode component and common mode component of signals. The amount of differential signals refers to the difference between two signals following formula Vdiff = V1 - V2. The amount of

Nowadays, the transmission rate of high-performance computer interconnection network with the application of high-speed serial transmission has developed into FDR (Fourteen Data Rate, 14Gb/s), the 4th generation from the primary SDR (Single Data Rate, 2.5Gb/s), DDR (Double Data Rate, 5Gb/s) and Q

Switching power supply technology has witnessed a development towards miniature, high frequency and high efficiency with the development of highly integrated chips in recent years. Highly integrated control chips make required peripheral components become simplified since it's relatively easy

With the increasing applications of large-scale and super-large scale integrated circuits in the system of circuits, circuit boards show a development trend towards multiple layers and complexity owing to the magnifying integration scale of chips, shrinking of volume, escalation of pins and incre

The improving of electronic products is closely related with the progress of electronic technology. With high-speed development of electronic technology, electronic products have developed towards miniature and density that brings about much interference to PCB electromagnetic compatibility (EMC)

With the upcoming development of electronic science and technology, the electronic system composed by IC chip is fast developing toward large scale, miniature and high speed. Simultaneously, a problem comes up as well that the shrinking of the volume of electronic system leads to the enlarging of

Nowadays, all kinds of electronic products have penetrated into all corners of people's life, leading to the fast development of PCBs that are the core of electronic devices. Whether electronic devices are capable of working normally, safely and stably depends on PCB design to a great extent.

In recent years, with the fast development of electronic products concerning digital video and digital mobile communications, the development in this type of products is pushing PCBs towards the development in terms of lightness, thinness, miniature, multiple functions and high density and reliab

The new generations of electronic technologies lead to increasing high edge speed of components. The improvement of working speed of circuit causes increasingly high requirements on PCB design. The quality of PCB design even determines the working performance of components and the whole circuit.

With the escalation of complexity of PCB design, stable and reliable power supply has become a new trend of research on high-speed PCB design. Especially when the number of switching components keeps constantly improving and Vcore constantly decreasing, the fluctuation of power tends to bring dea

The trend of miniature of electronic products leads to complicated structures of products, which promotes the prevalence of multi-chip module. The advent of core module is a new challenge for SMT. However, some problems such as false welding and continuous tin electrodeposit come up in the new pr

In the process of PCB soldermask manufacturing, the craft of PCB continuous double-side printing liquid soldermask by silkscreen printing nail-bed has been massively applied. Since relatively big differences take place between PCBs in terms of aspects of design including thickness, pattern distri

The fast development of electronic technology contributes to the high density of electronic components, which prompts the ability of anti-interference for PCB designers. In the process of PCB design, designers must conform to the generic principles of PCB design and requirement of anti-interferen

Crosstalk Theory Based on electromagnetic theory, crosstalk refers to the electromagnetic decoupling between two signal lines. It is a type of noise caused by mutual capacity and mutual impedance between signal lines. In Figure 1, among the two parallel lines, one line has signal source (V

Impedance control technologies are quite important in high-speed digital circuit design in which effective methods must be adopted to ensure the excellent performance of high-speed PCBs. Impedance Calculation and Impedance Control of High-Speed Circuit Transmission Lines on PCB • Equivale