Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC

LIU Su-juan; YANG Yue; ZHANG Te; CHEN Jian-xin

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Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC

更新时间：2025-07-16

- Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC
- Acta Electronica Sinica Vol. 39, Issue 8, Pages: 1889-1893(2011)
- 作者机构：
  
  北京工业大学电子信息与控制工程学院,北京,100124
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP335
- Published：2011
- 稿件说明：
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LIU Su-juan, YANG Yue, ZHANG Te, et al. Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC[J]. Acta Electronica Sinica, 2011, 39(8): 1889-1893.
DOI：

LIU Su-juan, YANG Yue, ZHANG Te, et al. Calibration Technique of Channel Mismatches in Hybrid Filter Banks ADC[J]. Acta Electronica Sinica, 2011, 39(8): 1889-1893. DOI：

摘要

针对各采样通路之间的不匹配影响混合滤波器组ADC的重构精度这一问题

本文提出了一种校准混合滤波器组ADC通路失配偏差的模型

该模型将通路间的增益偏差、相位偏差和带宽失配偏差引入到混合滤波器组ADC中.基于此模型

建立根据输出数据求解超定方程组估算失配偏差的方法

给出引入失配偏差的混合滤波器组的结构

推导出其完美重构条件.设计实现了160MHz 12-bit的两通路混合滤波器组ADC系统

实验结果表明

提出的通路失配偏差的校准方法可提高系统的无杂散动态范围(SFDR)23dB.

Abstract

The channel mismatches degrade the reconstruction performance of hybrid filter banks (HFB) analog-to-digital converters (ADC).This paper presents a comprehensive model that takes gain

phase

and bandwidth mismatches into account.Based on this model

a method that calculates the value of the channel mismatches by solving overdetermined equations is developed.An improved architecture is introduced based on the model and the perfect reconstruction expression is derived.Finally

a two-channel 160MHz 12-bit HFB ADC system is implemented.The experimental results show that the proposed calibration technique produces about 23 dB of spurious-free dynamic range (SFDR) enhancement.

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