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Combination of PCB designmethod and existing EDA software
At present, there is no integrated EDA software in the PCB design industry to complete the above-mentioned design method, so it must be realized through the combination of some general software tools.
Use general SPICE software (such as PSPICE, HSPICE, etc.) to establish SPICE models for discrete and passive components and transmission lines on the PCB, and debug and verify them.
Add the SPICE/IBIS models of various components and transmission lines that have been obtained to general signal integrity analysis software, such as SPECCTRAQuest, HyperLynx, Tau, IS_Analyzer, etc., establish the SI analysis model of the signal on the PCB board, and perform the signal integrity Analysis and calculation of sex.
Use the database function that comes with the SI analysis software, or use other general database software, to further sort and analyze the results of the simulation operation, and search for the ideal solution space.
The boundary value of the solution space is used as the basis for PCB circuit design and the constraints of layout design, and EDA software for general PCB design, such as OrCAD, Protel, PADS, PowerPCB, Allegro, and Mentor, is used to complete the PCB circuit design and layout design.
When the PCB layout design is completed, the parameters of the actual design circuit (such as topology, length, spacing, etc.) can be extracted automatically or manually through the above layout design software, and sent back to the previous signal integrity analysis software for wiring. SI analysis to verify whether the actual design meets the requirements of the solution space.
After the PCB board is manufactured, the correctness of each model and simulation calculation can also be verified through the measurement of experimental instruments.
