What aspects of good PCB design should be considered

Six points

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What kind of PCB stacking strategy helps shield and suppress EMI?

The following layered stacking scheme assumes that the supply current flows on a single layer, with single or multiple voltages distributed across different parts of the same layer. The case of multiple power planes is discussed later.

The role of PCB layered stacking in controlling EMI radiation

There are many ways to solve EMI problems. Modern EMI suppression methods include: using EMI suppression coatings, selecting suitable EMI suppression components, and EMI simulation designs. This article starts from the most basic PCB layout and discusses the role of PCB layered stacking in controlling EMI radiation.

High Frequency PCB Routing Skills

Digital devices are moving in the direction of high speed, low consumption, small size, and high anti-interference. This trend has put forward many new requirements for the design of printed circuit boards. The application of Protel software in China is quite common. However, many designers only pay attention to the Protel software's routing rate. The improvements made by Protel software to adapt to the changes of device characteristics are not used in the design, which not only makes software resources. The waste is more serious, and the excellent performance of many new devices is difficult to play. This paper intends to introduce Protel for Windows V1.5 software as an example to introduce the high-frequency circuit wiring when Protel software can Some special countermeasures are provided.

Calculation of characteristic impedance

We can derive the value of the characteristic impedance, which is the value of the instantaneous impedance seen by the signal during transmission.

Characteristic impedance of the transmission line

From a battery point of view, once the design engineer connects the battery leads to the front end of the transmission line, there is always a constant value of current flowing out of the battery and keeping the voltage signal constant. Some people may ask, what kind of electronic components have such behavior? A constant current value is maintained when a constant voltage signal is added, of course the resistance.

Analyze Characteristic Impedance--Basic Concept

In recent years, an increasingly important issue in the field of high-speed design has been the focus of design engineers on the design of controlled-impedance boards and the characteristic impedance of interconnects on boards.

Next Generation Design Tools Outlook

To address signal integrity issues, the entire design process needs to be further upgraded to become a complete set of tools that can take into account multiple different effects and design assessments.

Method for solving signal integrity problems in ASIC chip design

For the design of ASIC (Application Specific Integrated Circuit), the performance of standard cells is wasted due to the application of standard cells, shorter development cycle, and more relaxed protection between cells. Therefore, the key to high-end ASIC chip design is to ensure high-performance chips are delivered with shorter development time.

Focus on signal integrity in complex designs

In SoC design, the coupling between signals can cause signal integrity problems. Neglecting signal integrity problems can lead to crosstalk between signals, and reliability, manufacturability and system performance will also be reduced.

EMC design skills inside the product

At present, electronic equipment is used in various electronic devices and systems, and printed circuit boards are still the main assembly method. Practice has proved that even if the schematic design of the circuit is correct and the printed circuit board is not properly designed, it will adversely affect the reliability of the electronic device. For example, if the two thin parallel lines of the printed board are in close proximity, a delay in the signal waveform is formed, and reflected noise is formed at the end of the transmission line. Therefore, when designing a printed circuit board, care should be taken to use the correct method.

The importance of layout in high speed PCB design

Throughout the successful electronic products, we must have five characteristics: one is stable in performance; two is beautiful in appearance; three is easy to apply; four is reasonable in cost; five is convenient for mass production; and it is not a successful product. These five points are related to the layout. In other words, a good and reasonable layout is to fully consider the above five points, so the layout is a very important part of the success of the product.

Electromagnetic compatibility design

Electromagnetic compatibility refers to the ability of an electronic device to work in a coordinated and efficient manner in various electromagnetic environments. The purpose of the electromagnetic compatibility design is to enable the electronic device to suppress various external interferences, enable the electronic device to work normally in a specific electromagnetic environment, and at the same time reduce the electromagnetic interference of the electronic device itself to other electronic devices.

Tips and methods for high frequency PCB design

1. The corner of the transmission line should be at a 45° angle to reduce the return loss.

Several issues that should be taken seriously by mobile phone PCB design

1. Power and ground processing

How to ensure that no noise is added when designing PCB

It must be considered from the following aspects:

PCB design partitions of Mobile phone

PCB design partition can be decomposed into physical partitions and electrical partitions. Physical partitioning mainly involves component layout, orientation, and shielding; electrical partitioning can continue to be broken down into partitions for power distribution, RF traces, sensitive circuits and signals, and grounding.

RF layout tips for mobile phone PCB design

The increase in the functionality of the mobile phone requires higher design of the PCB.

PCB design tips 100, teach you to master PCB design easily (96-100)

After floating copper automatically, the floating copper fills the blank space according to the position of the device on the board and the layout of the traces.