A noise-shaping algorithm of multi-bit DAC nonlinearities in complex bandpass ΔΣAD modulators

被引：0

作者：

San, H ^{[1
]}

Kobayashi, H ^{[1
]}

Kawakami, S ^{[1
]}

Kuroiwa, N ^{[1
]}

机构：

[1] Gunma Univ, Fac Engn, Dept Elect Engn, Kiryu, Gumma 3768515, Japan

来源：

IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES | 2004年 / E87A卷 / 04期

关键词：

complex bandpass Delta Sigma AD modulator; bandpass filter; noise-shaping; ADC; DAC; element rotation; data-weighted averaging; low-IF receiver;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper presents a technique for improving the SNR and resolution of complex bandpass DeltaSigmaADCs which are used for wireless communication systems such as cellular phone, wireless LAN and Bluetooth. Oversampling and noise-shaping are used to achieve high accuracy of a DeltaSigmaAD modulator. However when a multi-bit internal DAC is used inside a modulator, nonlinearities of the DAC are not noise-shaped and the SNR of the DeltaSigmaADC degrades. For the conversion of complex intermediate frequency (IF) input signals, a complex bandpass DeltaSigmaAD modulator can provide superior performance to a pair of real bandpass DeltaSigmaAD modulators of the same order. This paper proposes a new noise-shaping algorithm-implemented by adding simple digital circuitry-to reduce the effects of nonlinearities in multi-bit DACs of complex bandpass DeltaSigmaAD modulators. We have performed simulation with MATLAB to verify the effectiveness of the algorithm, and the results show that the proposed algorithm can improve the SNR of a complex bandpass DeltaSigmaADC with nonlinear internal multi-bit DACs.

引用

页码：792 / 800

页数：9

共 27 条

[21] Analysis and Design of Low-Complexity Stochastic DEM Encoder for Reduced-Distortion Multi-bit DAC in Sigma-Delta Modulators
Li, Di
Fei, Chunlong
Zhang, Qidong
CIRCUITS SYSTEMS AND SIGNAL PROCESSING, 2021, 40 (01) : 296 - 310
[22] A 8KHz-Bandwidth 13.7bit-ENOB Low-Power Noise-Shaping SAR ADC Using Split-Capacitor DAC
Zhou, Jidong
Duan, Jihai
2021 THE 6TH INTERNATIONAL CONFERENCE ON INTEGRATED CIRCUITS AND MICROSYSTEMS (ICICM 2021), 2021, : 319 - 322
[23] Fast and efficient algorithm to design noise-shaping FIR filters for high-order overload-free stable sigma-delta modulators
Yagyu, M
Nishihara, A
2004 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL 1, PROCEEDINGS, 2004, : 469 - 472
[24] Design of noise shaping fir filters by-minimizing in-band peak amplitude for stable single- and multi-bit data converters
Yagyu, M
PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL I: ANALOG CIRCUITS AND SIGNAL PROCESSING, 2003, : 945 - 948
[25] A 0.5-bit step multi-resolution adjustable-input range reconfigurable noise-shaping TDC using multi-step quantizer gated-ring oscillators
Mekky, Rania Hassan
El-Gamal, Mourad N.
ANALOG INTEGRATED CIRCUITS AND SIGNAL PROCESSING, 2018, 95 (01) : 31 - 51
[26] A 0.5-bit step multi-resolution adjustable-input range reconfigurable noise-shaping TDC using multi-step quantizer gated-ring oscillators
Rania Hassan Mekky
Mourad N. El-Gamal
Analog Integrated Circuits and Signal Processing, 2018, 95 : 31 - 51
[27] Digital Assisted Truncation Noise Shaping Technique for Multi-bit ΣΔ\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\Sigma \Delta $$\end{document} Modulators
Leila Sharifi
Omid Hashemipour
Arabian Journal for Science and Engineering, 2021, 46 (2) : 1279 - 1286

← 1 2 3 →