一种电荷再分布的逐次逼近AD转换器设计  

Design of Charge Redistribution SAR DAC

作　　者：高加亭[1] 赵宏建[1] 

机构地区：[1]中国电子科技集团公司第四十七研究所,沈阳110032

出　　处：《微处理机》2015年第6期6-8,共3页Microprocessors

摘　　要：设计了一种电荷再分布逐次逼近AD转换器电路。通过引入耦合电容CS,整个电容阵列只需要128个单位电容C,相比直接使用二进制加权电容阵列,节省了近97%的单位电容数量。选用Charted 0.35μm Mix Signal,3.3V工艺模型进行设计,仿真结果表明,转换器的分辨率LSB=0.6m V,能够达到12位转换精度。The charge redistribution successive approximation analog- to- digital converter is designed in this paper. By adding coupling capacitance CS,128 unit capacitances C are used in the capacitor array,and almost 97% unit capacitances is saved comparing with the directly using binary weighted capacitor array. The simulation is completed by 0. 35μm Mix Signal,3. 3V process model in Charted and the results show that the resolution of the converter（ LSB） is 0. 6m V and can reach 12 bits conversion accuracy.

关 键 词：逐次逼近 模数转换器 数模转换器 电荷再分布 

分 类 号：TN752.2[电子电信—电路与系统]