Signal integrity theory is gaining increasing attention in high speed digital circuit design impedance matching plays an important role.
信号完整性理论在高速数字电路设计中日益被重视，阻抗匹配在信号完整性理论中占有重要地位。
Phase matching is of particular concern with some high speed digital circuits, because unmatched cables may cause excessive clock skew, resulting in erroneous operation.
由于不匹配的电缆可引起过度的时钟相偏（Clock Skew），导致错误操作，所以相位匹配是有些高速数字电路中特别要注意的事项。
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