Abstract: This dissertation presents four circuit design techniques for successive-approximation register (SAR) analog-to-digital converters (ADCs). According to the measurement results of the proof-of-concept prototypes, the proposed techniques are
提出了一种带参考注入信号的校准算法,用于校准时间交织模数转换器(Time-Interleaved Analog-to-Digital Converter,TIADC)的时间失配误差。该算法引入参考注入信号,参考注入信号通过采样保持电路(sample hold circuit,S/H)后,利用TIADC的各子通道时钟依次控制S/H,对其输出后的值进行运算获得时间误差,再将时间误差反馈回多相时钟产生器,利用可变延迟线实现时间失配的补偿。该算法运算简单,消耗的硬件资源低,对输入信号没有限制,可以扩展到
采用单环级联分布式前馈结构(CIFF)设计并实现了一款三阶四比特量化的Σ-Δ数字调制器。噪声传递函数通过局部反馈技术进行了零点优化,并且对各系数进行CSD(Canonical Signed Digit)编码优化。系统建模仿真结果得到SNDR为120.3 dB,有效位数(ENOB)为19.7位。针对多位量化适配问题,采用数据加权平均(DWA)算法对误差进行噪声整形,以减小失配引起的非线性误差。利用增加单元DAC的方法,对DWA算法进行改进,解决了其在直流或低频周期信号下会产生杂波的问题,并对其进行
This paper presents a wide-band and energy-efficient 0-1 MASH ΣΔ ADC which is realized based on the pipelined-SAR structure. Composed by a 6b SAR ADC in the 1st-stage and a 5b SAR ADC in the 2nd-stage, with alternate loading capacitors (ALC) reused f