The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator

CHEN Jian-bin; ZHOU Qiang; TAN Xiao; ZHAO Zhi-yuan

doi:10.3969/j.issn.0372-2112.2015.07.025

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The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator

更新时间：2025-07-16

- The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator
- Acta Electronica Sinica Vol. 43, Issue 7, Pages: 1413-1417(2015)
- 作者机构：
  
  南京电讯科技研究所,江苏,南京,210007
- 作者简介：
- 基金信息：
  
  China Postdoctoral Science Foundation (No.2013M532239)
- DOI：10.3969/j.issn.0372-2112.2015.07.025
  CLC： TN911.6
- Published：2015
- 稿件说明：
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CHEN Jian-bin, ZHOU Qiang, TAN Xiao, et al. The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator[J]. Acta Electronica Sinica, 2015, 43(7): 1413-1417.
DOI：

CHEN Jian-bin, ZHOU Qiang, TAN Xiao, et al. The Research of Level-Transform Strategy for Switching Amplifier Based on 2 Bit Delta-Sigma Modulator[J]. Acta Electronica Sinica, 2015, 43(7): 1413-1417. DOI： 10.3969/j.issn.0372-2112.2015.07.025.

摘要

通过增加量化电平

Delta-Sigma调制器(DSM)能够获得更好的调制性能.但限于开关功放的具体结构

多电平DSM序列无法直接驱动后级功放

本文根据面积等效原理提出了适用于开关功放的一种电平变换策略.理论分析和仿真结果表明

通过采用合适的电平变换方式

变换序列能够获得比常规2电平DSM序列更优的带内SNR性能.

Abstract

The Delta-Sigma modulator (DSM) can get a better performance by increasing the quantizer's levels.But the multi-level DSM output cannot drive the switching amplifier directly due to the structural restrict of switching amplifier.By using the equalarea theory

a level-transform strategy is proposed and analyzed in this paper.With an appropriate level-transform scheme

the transformed DSM output obtains a much better SNR performance compared to the origin 2-level output.

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