Signal Integrity Analysis Of High-speed Digital Circuits

With the fast development of high-speed digital circuit and high-integrated chip technology, signal integrity (SI) problems become increasingly serious. These problems bring great challenges to the system hardware design, and designing high-speed digital circuit with good SI performances has become the dominant factor of system design. This thesis focuses on SI problems in high-speed digital circuit.Firstly, the SI problems of high-speed digital circuit design are introduced, which divided into four classes: one for single conductor interconnector (reflection, time delay), two for multi-conductors interconnectors (crosstalk, coupling), three for Simultaneous Switch Noise (SSN), and four for electromagnetic interference (EMI). Then, the present research status is summarized.Secondly, the first and second class signal integrity came down to high speed interconnectors can be analysis together. Firstly expounds the basic theory of BP neural network model, using the transmission of frequency domain waveform assimilation. Using this analysis, a detailed analysis based on the BP neural network of high speed digital circuits interconnect time domain response problem: including single conductor of the signal transmission between the signal conductors and more reflective of complex structure and the time domain response, etc.Thirdly, the third class for signal integrity problem was introduced, involved in the simultaneous switching noises (SSN) and its mechanism. Because the origins of SSN are kinds of inductance, the inductance and its approximate expressions are presented. And on this basis, the simultaneous switching noises analysis of all activities and part activities device are shown.Finally, in the design of high-speed digital electromagnetic interference of electromagnetic radiation will be divided into common-mode and differential-mode two modes, analysis the mechanism. The models of electromagnetic interference are presented for the interference sources are located in beginning or arbitrary position.