电子与封装2025，Vol.25Issue(6)：72-79,8.DOI:10.16257/j.cnki.1681-1070.2025.0057
一种高精度离散时间Sigma-Delta调制器的设计
Design of a High-Precision Discrete-Time Sigma-Delta Modulator
郭林 1万江华 2邓欢3
作者信息
- 1. 湘潭大学物理与光电工程学院,湖南湘潭 411100
- 2. 湘潭大学物理与光电工程学院,湖南湘潭 411100||湖南毂梁微电子有限公司,长沙 410000
- 3. 湖南毂梁微电子有限公司,长沙 410000
- 折叠
摘要
Abstract
The design of a third-order three-bit quantized discrete-time Sigma-Delta modulator is described.Considering power consumption and area saving,the cascaded integral feedforward(CIFF)structure is chosen for the modulator structure.The three-bit quantization of the modulator is realized by seven multi-bit comparators.In order to achieve high accuracy,the gain-boosting technique is used to increase the gain of the operational amplifier in the integrator.At the same time,a data-weighted averaging(DWA)circuit is used to shape the noise introduced by the mismatch of the digital-to-analog converter(DAC)capacitors at the input to increase the effective number of bits.The modulator is designed using 55 nm CMOS process,with a bandwidth of 16 kHz and an effective bit count of 19.10 bits at a supply voltage of 3.3 V,a temperature of 27 ℃,and a typical tt process corner.关键词
Sigma-Delta调制器/级联积分前馈/gain-boosting技术/数据加权平均Key words
Sigma-Delta modulator/cascaded integral feedforward/gain-boosting technique/data-weighted averaging分类
信息技术与安全科学引用本文复制引用
郭林,万江华,邓欢..一种高精度离散时间Sigma-Delta调制器的设计[J].电子与封装,2025,25(6):72-79,8.
