电子与封装2026，Vol.26Issue(6)：61-66,6.DOI:10.16257/j.cnki.1681-1070.2026.0098
一种多比特量化的高精度Sigma-Delta DAC设计
Design of High-Precision Sigma-Delta DAC with Multi-Bit Quantization
摘要
Abstract
A high-precision Sigma-Delta DAC with multi-bit quantization is designed.A 3rd-order 4-bit quantization cascaded resonant distributed feedback(CRFB)modulator is employed to effectively reduce analog circuit design complexity and enhance system performance.Concurrently,a data weighted averaging(DWA)circuit is utilized to shape capacitance mismatch noise,thereby improving overall performance.Furthermore,by refining the circuit structure of the switched-capacitor DAC and optimizing the transfer function,the requirements for the operational amplifier slew rate and bandwidth are reduced.The entire circuit is implemented using a 0.15 μm BCD process.At a sampling frequency of 10.24 MHz,the post-simulation signal-to-noise distortion ratio(SNDR)is 98.2 dB,and the total harmonic distortion(THD)is-102.3 dB,demonstrating excellent dynamic performance.关键词
Sigma-Delta DAC/开关电容DAC/级联谐振分布式反馈/数据加权平均算法Key words
Sigma-Delta DAC/switched-capacitor DAC/cascaded resonant distributed feedback/data weighted averaging分类
信息技术与安全科学引用本文复制引用
谭琦扬,张瑛,杜建新,裴春泽..一种多比特量化的高精度Sigma-Delta DAC设计[J].电子与封装,2026,26(6):61-66,6.基金项目
江苏省高校自然科学研究面上项目(16KJB510033) （16KJB510033）
