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Here you'll find insights into PCB design, tech trends, assembly issues, and trending topics
in the general news media as they relate to printed circuit board technology.
As experts in the manufacture and assembly of printed circuit boards, we work to make our blog a helpful resource on PCB topics and the industries that we work with, including automotive, consumer electronics, aerospace and many more.
Basic grounding method: There are three basic grounding methods in electronic equipment: single-point grounding, multi-point grounding, and floating ground.
Right-angle alignment is generally required in pcb cabling to avoid the situation, but also almost one of the standards to measure the quality of the cabling, then the right angle of the trace will have much impact on the signal transmission? In principle, a right-angled trace will cause the linewidth of the transmission line to change, resulting in an impedance discontinuity. In fact, not only the right-angle traces, but also the angles of sharp angles and acute angles may cause impedance changes.
In the design of electronic systems, in order to avoid detours and save time, the anti-interference requirements should be fully considered and avoided, and remedial measures against interference should be avoided after the design is completed. There are three basic elements that form interference:
The anti-jamming measures that are not common in some literatures are detailed below. Considering the practical application, especially in the trial production of products, double panels are still widely used. The following contents are mainly for double panels.
Part 1-5
1. Shape 2. Orig 3. Matrix
First, consider the size of the PCB.
PCB design needs to set different points in different stages. In the layout stage, large grid points can be used for device layout.
One of the main purposes of the design of the circuit schematic is to provide a network table for the design of the PCB board and to prepare the basis for the design of the pcb board.
As an electronic engineer, designing a circuit is a must-have hard work, and the principle design is perfect. If the board design is unreasonable, the performance will be greatly reduced, and even if it is serious, it will not work properly.
This article uses Protel99 SE as a design tool to analyze and discuss the basic principles and experience and skills in PCB design.
How to reduce the mutual interference between digital signals and analog signals?
As the packing density increases and the operating frequency increases, the signal integrity problem in MCM circuit design cannot be ignored. Taking the detector circuit as an example, this paper firstly uses APD software to realize the layout and layout design of the circuit, and then combines the signal integrity analysis to adjust the circuit layout and wiring structure repeatedly. The final Spectra Quest software simulation results show that the improved circuit layout and routing Meet signal integrity requirements while maintaining high simulation accuracy.
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.
The process is as shown below: (PCB/LCD design)-->(CAM system)-->(Gerber file)
1-4 Measures taken to increase the system's ability of it.
1. PCB clock frequency exceeds 5MHZ or signal rise time is less than 5ns, generally requires the use of multi-layer board design.
Combine an actual DSP high-speed image data acquisition system to illustrate the generation of signal integrity problems and specific solutions.
The frequency measurement is generally performed by a scanning spectrum analyzer, which scans the amplitude of each frequency signal and stores it under a certain resolution bandwidth (RBW), thereby displaying the information of the amplitude as a function of the entire frequency band. The RBW is an important consideration for scanning spectrum analyzers to provide excellent dynamic range and high accuracy of the static spectral components of the signal. However, the main disadvantage of a scanning spectrum analyzer is that it tests the amplitude of a frequency point of the signal only at one point in time.
There are many simulation tools for analyzing signal integrity, each with its own characteristics.
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