PCB design skills fifteen questions.Multilayer Printed Circuit Board FR4_Shenzhen StarLight Industrial Development Co., Ltd.

PCB design skills fifteen questions.Multilayer Printed Circuit Board FR4

source:News release time:2023-04-07 Hits: Popular:PCB Assembly company: Share:

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　　1. How to choose PCB board?

　　Select PCB boards to obtain a balanced point between meeting design needs and mass production and cost in the middle

　　Design requirements include two parts of electrical and institutions

　　This material problem is usually more important when designing very high -speed PCB boards (more than GHz)

　　For example, the commonly used FR-4 material, the medium loss at the frequency of several GHz (Dielectric Loss) will have a great impact on the attenuation of the signal.

　　As far as electrical is concerned, pay attention to whether the Dielectric Constant and the frequency of the medium loss are used in the designed frequency

　　2. How to avoid high -frequency interference?

　　The basic idea of avoiding high -frequency interference is to minimize the interference of high -frequency signal electromagnetic fields, which is the so -called string spoiler

　　The distance between the high -speed signal and the analog signal, or add the GROUND Guard/Shunt Traces next to the analog signal

　　Also pay attention to the noise interference of the simulation ground digitally

　　3. In high -speed design, how to solve the problem of signal integrity?

　　Signal integrity is basically the problem of impedance matching

　　The factors that affect impedance matching include the architecture and output impetance of signal sources.

　　The solution is to rely on Termination and Tuo Pu in adjusting the line

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