中文摘要：

采用数字化端子控制技术，基于负反馈动态调整原理和可调多晶硅电阻条，设计了新颖的、符合高速串行接口USB2．0协议要求的高精度片上匹配电阻电路．使用TSMC的CMOS0．25μm混合信号模型，在Cadence软件环境下用spectre仿真器模拟，结果表明在500Mbps的高速时钟信号作用下．所设计的匹配电阻阻值在[44．3Ω,45．6Ω]范围内，最大稳定时间6μs，平均误差为±1．45％，所设计电阻平均变化范围为45×（1±1．45％）Ω，最大误差范围1．56％，达到并高于45×（1±10％）Ω的高速串行接口协议要求．

英文摘要：

A novel high - precision termination resistor circuit on chip in agreement with high - speed serial link was proposed. Based on in negative -feedback dynamic adjustment and digital -based analog circuit - design technology, this paper brings forward an active high -precision termination resistor cireuit on chip topology based upon adjustable polycrystalline - silicon resistance branches. Using Cadence＇ s SPECTRE software and TSMC＇ s library of 0.25μm mixed -signal CMOS.model, the simulation results revealed that the value of termination resistor in this paper ranged within [44.3Ω,45.6Ω] , meanwhile the maximum time leveling off is less than 6μs,the average error is ± 1.45% , maximum error range within 1.56% ,and it can meet the protocol requirement of 45×（1±10%）Ω.