Signal integrity test method and system based on simulation model and free topological structure

Abstract

The invention discloses a signal integrity test method and system based on a simulation model and a free topological structure. A method for comparing the output curves by establishing a network topology structure and a network topology physical structure is adopted, various attributes influencing the waveform integrity of the outputted curve are changed, an optimal network topology structure andan optimal network topology physical structure are obtained, the optimal IBIS model and the coupling line attribute in the optimal network topology structure are adjusted according to the output waveform curve of the optimal network topology physical structure until the output waveform curve closes to a theoretical output waveform curve is obtained, so that the defect that in the prior art, a model is inaccurate is overcome, and the confidence coefficient of a corresponding signal integrity evaluation method is improved.

Description

technical field [0001] The invention relates to a signal integrity testing method and system based on a simulation model and a free topological structure, and belongs to the field of high-speed bus signal integrity analysis and evaluation. Background technique [0002] The SpaceWire bus is a new bus proposed for the traditional RS422 bus, CAN bus, 1553B bus, etc., which have shortcomings such as slow communication speed, short transmission distance, poor protocol coordination, lack of error correction and tolerance mechanisms, high power consumption, and heavy cables. . As a high-speed data transmission bus, the SpaceWire bus is widely used in the aerospace field at home and abroad. For the first-generation SpaceWire bus used in aerospace communications, its design transmission frequency is 280MHz; the second-generation bus that is currently in the final stage of development The design transmission frequency of the first generation SpaceWire bus is 680MHz. Compared with th...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the invention is: aiming at the deficiencies of the existing technology, through the combination of simulation and testing, the problems of inaccurate models, inaccurate simulation results, and long testing time caused by repeated hardware production in traditional testing methods are improved, and a new method is proposed. A signal integrity testing method and system based on a simulation model and a free topology structure, which makes up for the shortcomings of the traditional method by optimizing the device model and correcting the simulation results by testing the physical topology structure, and solves the problem of the signal integrity of the high-speed data bus used in aerospace. Difficulty in evaluating

Images