摘爰摘要脉冲无线电超宽带(Impulse Band,)通信系统是一种占用频带资源很高的新型无线通信系统。其高速的数据传输速率有着传统无线传输技术难以比拟的优点。由于移动无线通信的信号传输信道存在时变问题,接收机天线获取的信号时大时小。因此需要引入自动增益控制模块(AGC)电路,从而达到稳定输入信号大小的目的。本文分析了有源电感在提升系统带宽的作用,采用伪指数电路结构实现增益与控制变量成dB线性关系,同时加上了环路反馈消除直流失调以及匹配电路等模块,设计出了一个高频3dB带宽为IGHz,, ,。本设计采用SMIC 。流片测试结果表明设计基本实现了系统的指标要求。由于UWB超高的无线传输速率,这对后续的高速ADC设计提出了很高的设计压力。本文探讨了基于时间交替采样技术的多路并行ADC(TIADC)的系统集成方案结构。同时针对该结构和采样时钟偏移,提出了一种适合片上实现的 3点曲线拟合快速算法。通过Matlab对4通道ADC进行了存在采样时钟偏移情况下的建模,仿真结果表明在采样时钟最大偏差不超过5%的情况下,该结构和算法能将系统的无杂散动态范围(SFDR)从在校『F前的-,,为实现高速TIADC通道失配误差的在线校正提供了一个可行方法。关键字:超宽带CMOS可变增益放大器TIADC数字后端校正时钟误差快速插值 Abstract Abstract Ultra-munication system is munication system which has a very high bandwidth has theadvantage ofhigh-speed datatransfer paring tothetraditional wireless transmission technology that can notmatch. Inthemobile munication signal transmission channel thereistheissue oftiming the signal obtained by thereceiver’Santenna doesn’thas a fixedampl we need todesign theautomated gaincontrol(AGC)circuit in order tostabilize theamplitude oftheinput paper analyzes theactive inductor inenhancing the roleofsystem bandwidth,using function torealizethelinear-dB inorder tocanoel theDC offsetcaused by the zero-IF receiving topology,an extra circuitisalsoadded the input/output match circuit is also adopted forthe test finally a high-frequency with a3dB bandwidth of GHz VGA highest gain of thisdesign while theminimum gain gainrange of theVGA system . The UWB wireless transmission ofultra·high speed puts great pressure on the back—enddesign ofhigh-speed paper discusses thesystem integrated solutionoftheTime InterleavedADC(TIADC).A new TIADC system suitablefor thedigital—background measurement and calibration of these errors isproposed inthis
