Design of second order high precision discrete time sigma delta modulator

LIU Zhen-yu; SONG Shu-xiang; JIANG Pin-qun; CAI Chao-bo; CEN Ming-can

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Design of second order high precision discrete time sigma delta modulator

更新时间：2026-09-04

- Design of second order high precision discrete time sigma delta modulator
- Vol. 38, Issue 6, Pages: 77-81(2021)
- 作者机构：
  
  广西师范大学机构电子工程学院,广西,桂林,541004
- 作者简介：
- 基金信息：
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- Published：2021
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刘振宇, 宋树祥, 蒋品群, 蔡超波, 岑明灿. 二阶高精度离散时间Sigma-Delta调制器的设计[J]. 微电子学与计算机, 2021, 38(6): 77-81.

LIU Zhen-yu, SONG Shu-xiang, JIANG Pin-qun, et al. Design of second order high precision discrete time sigma delta modulator[J]. 2021, 38(6): 77-81.
刘振宇, 宋树祥, 蒋品群, 蔡超波, 岑明灿. 二阶高精度离散时间Sigma-Delta调制器的设计[J]. 微电子学与计算机, 2021, 38(6): 77-81. DOI：

LIU Zhen-yu, SONG Shu-xiang, JIANG Pin-qun, et al. Design of second order high precision discrete time sigma delta modulator[J]. 2021, 38(6): 77-81. DOI：

摘要

精度在14bit以上的Sigma-Delta调制器均采用高阶结构，从而存在复杂性较高的问题。本文采用二阶结构并借助Matlab SDToolbox设计一种使用开关电容电路结构实现的二阶16bit高精度Sigma-Delta调制器。通过对调制器的输出结果进行验证证明其具有16bit精度，从而降低了14bit以上调制器的阶数。通过对实际晶体管级电路的仿真，验证了该方法的有效性。

Abstract

Sigma-Delta modulators with accuracy above 14bit all adopt high order structure

which leads to high complexity problem. In this paper

a second-order 16 bit high-precision sigma delta modulator with switched capacitor circuit structure is designed by using the second-order structure and MATLAB SDtoolbox. The output results of the modulator are verified to have the accuracy of 16bit

thus reducing the order of the modulator above 14 bit. The effectiveness of the proposed method is verified by the simulation of a practical transistor level circuit.

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references

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曹桂平. 高精度Sigma-Delta调制器研究及ASIC实现[D]. 北京: 中国科学技术大学, 2012. CAO G P. Study and ASIC implementation of high-resolution Sigma-Delta modulator[D]. Beijing: University of Science and Technology of China, 2012.

周志兴, 来强涛, 姜宇, 等. 一种应用于角度传感器的Sigma Delta ADC设计[J]. 微电子学与计算机, 2019, 36(8): 25-29. DOI: 10.19304/j.cnki.issn1000-7180.2019.08.006. ZHOU Z X, LAI Q T, JIANG Y, et al. Design of sigma delta ADC for angle sensor[J]. Microelectronics% Computer, 2019, 36(8): 25-29. DOI: 10.19304/j.cnki.issn1000-7180.2019.08.006.

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