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TCN网关高速PCB设计研究 被引量:2
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作者 石小磊 阎东 周达 《铁道机车与动车》 2020年第2期10-13,17,I0003,共6页
讨论高速PCB设计中的延时、反射、串扰、振铃等信号完整性问题,针对TCN网关CPU板的400 MHz DDR时钟差分信号模型,结合Polar SI9000工具进行差分特性阻抗分析和计算,设置合适的约束规则控制PCB布局布线,从各个环节保证差分信号的阻抗匹... 讨论高速PCB设计中的延时、反射、串扰、振铃等信号完整性问题,针对TCN网关CPU板的400 MHz DDR时钟差分信号模型,结合Polar SI9000工具进行差分特性阻抗分析和计算,设置合适的约束规则控制PCB布局布线,从各个环节保证差分信号的阻抗匹配和高速电路的信号完整性。 展开更多
关键词 信号完整性 差分特性阻抗 阻抗匹配 高速PCB POLAR SI9000 PCB布线约束
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A fractional-order multifunctional n-step honeycomb RLC circuit network 被引量:2
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作者 Ling ZHOU Zhi-zhong TAN Qing-hua ZHANG 《Frontiers of Information Technology & Electronic Engineering》 SCIE EI CSCD 2017年第8期1186-1196,共11页
We investigate a multifunctional n-step honeycomb network which has not been studied before. By adjusting the circuit parameters, such a network can be transformed into several different networks with a variety of fun... We investigate a multifunctional n-step honeycomb network which has not been studied before. By adjusting the circuit parameters, such a network can be transformed into several different networks with a variety of functions, such as a regular ladder network and a triangular network. We derive two new formulae for equivalent resistance in the resistor network and equivalent impedance in the LC network, which are in the fractional-order domain. First, we simplify the complex network into a simple equivalent model. Second, using Kirchhoff's laws, we establish a fractional difference equation. Third, we construct an equivalent transformation method to obtain a general solution for the nonlinear differential equation. In practical applications, several interesting special results are obtained. In particular, an n-step impedance LC network is discussed and many new char- acteristics of complex impedance have been found. 展开更多
关键词 Honeycomb network Equivalent transformation Fractional differential equation Impedance characteristics
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