1.5位pipelined ADC单级传函的数模分析  

Analysis of single-stage transfer function mathematical model of 1.5-bit pipelined ADC

作　　者：李博 张科峰[1] 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《现代电子技术》2012年第4期195-197,共3页Modern Electronics Technique

基　　金：国家重大科技专项课题:新一代宽带无线移动通信网(2010ZX03007-002-02)

摘　　要：1.5位结构是构成pipelined ADC的基本单元,总结了2位向1.5位方案传函的演变过程,但对转换的最优性并未证明。在此通过理论分析揭示了ADC及其单级传输函数变换的本质,证明了在Pipeline结构中,ADC单级传输函数演变的本质是:通过单级传函的变化,使整个ADC最终的传输函数与我们所习惯使用的(或者说最初使用的),相差不大于1个LSB,同时在参考电压失调,子DAC输出失调或者增益错误方面获得一定的鲁棒性。The 1.5-bit structure is the basic unit of a pipelined ADC.The evolution process of the program from 2-bit to 1.5-bit are summarized in Reference [1],but the optimality of conversion does not be proved.In this paper,theoretical analysis reveals the nature of ADC and its evolution process of the single-stage transfer function in the pipeline structure.The nature of evolution process of the single-stage transfer function is: the change of single-stage transfer function makes the differece to be no more than 1 LSB between the ADC transfer function and that the engineers are accustomed to using(or initial use),while gaining a certain robustness for the reference voltage offset,sub-DAC output offset or gain errors.

关 键 词：PIPELINED ADC 1.5位 传输函数 DC传输曲线 右移Vref/4 

分 类 号：TN7[电子电信—电路与系统]