一种Vcm-Based10位16M采样率低功耗逐次逼近型模数转换器
发布时间：2019-05-23 22:51
【摘要】：针对无线传感网络中低功耗无线传感器的应用,设计了一种采样速率为16MSPS,精度10bit的全差分超低功耗逐次逼近型模数转换器(SAR ADC).提出一种基于Vcm-Based参考电压的开关切换逻辑,减少DAC模块参考电压开关切换的功耗.同时,DAC电容阵列模块采用分段式结构,单位电容采用优化的MOM电容,有效提高ADC的匹配性和精度;此外采用了双尾电流型动态锁存比较器,实现功耗的最优化.芯片采用CMOS 65nm工艺设计,后仿结果显示在1.2V电源电压及16MSPS采样率下,ADC有效位数达到9.42bit,功耗为140μW,品质因数(FOM)为12.8fJ/Conversion-step.
[Abstract]:Aiming at the application of low power wireless sensor in wireless sensor network, a full differential ultra low power successive approximating analog to digital converter (SAR ADC). With sampling rate of 16MSP and precision 10bit is designed. A switching logic based on Vcm-Based reference voltage is proposed to reduce the power consumption of DAC module reference voltage switch. At the same time, the DAC capacitor array module adopts the segmented structure, the unit capacitance adopts the optimized MOM capacitance, which effectively improves the matching and accuracy of ADC, in addition, the double tail current mode dynamic latch comparator is used to optimize the power consumption. The chip is designed by CMOS 65nm process. The simulation results show that the effective number of ADC is 9.42 bit, the power consumption is 140 渭 W, and the quality factor (FOM) is 12.8fJ 鈮，
本文编号：2484307
[Abstract]:Aiming at the application of low power wireless sensor in wireless sensor network, a full differential ultra low power successive approximating analog to digital converter (SAR ADC). With sampling rate of 16MSP and precision 10bit is designed. A switching logic based on Vcm-Based reference voltage is proposed to reduce the power consumption of DAC module reference voltage switch. At the same time, the DAC capacitor array module adopts the segmented structure, the unit capacitance adopts the optimized MOM capacitance, which effectively improves the matching and accuracy of ADC, in addition, the double tail current mode dynamic latch comparator is used to optimize the power consumption. The chip is designed by CMOS 65nm process. The simulation results show that the effective number of ADC is 9.42 bit, the power consumption is 140 渭 W, and the quality factor (FOM) is 12.8fJ 鈮，
本文编号：2484307
本文链接：https://www.wllwen.com/kejilunwen/dianzigongchenglunwen/2484307.html
