基于Protel 99的PCB信号完整性分析（PCB signal integrity analysis based on Protel 99）.doc

基于Protel 99的PCB信号完整性分析（PCB signal integrity analysis based on Protel 99） This article is contributed by liuquanfu71 Doc documents may have a poor browsing experience at the WAP end. It is recommended that you choose TXT, or download the source file to the native view. Pick to: based on the signal integrity analysis simulators, design rules, integrity analysis waveform analyzer, illustrates how to use the three aspects, such as Protel 99 signal integrity analysis function for the design of printed circuit boards. Key words: signal integrity; Electromagnetic interference; With the continuous emergence of various large-scale and high-density new electronic components, the design of electronic circuits is becoming more and more complicated and more sophisticated. Circuit based on the urgent demand and CAD design technology and make full use of the computer revolution brought about by the results, makes the design means, great changes have taken place in the Protel 99 electronic design software is a powerful function, friendly interface, easy to operate practical rapid, efficient circuit CAD design software. In order to ensure that the design of circuit can work reliably, need for accurate timing circuit, waveform analysis, signal integrity analysis, electromagnetic noise analysis and so on, in order to avoid the blindness of design, reduce the design cost. This paper focuses on how to use Protel 99 software to perform pre-signal analysis of PCB design, which makes the design circuit more feasible. Signal integrity of the concept Electromagnetic interference electromagnetic interference refers to the electronic products to outside noise, caused the equipment, apparatus, or system performance to reduce electromagnetic phenomenon, mainly divided into two kinds of conducted interference and radiation interference. Conduction interference refers to the coupling (interference) of the signal from an electrical network to another network by electromagnetic conduction. Radiation