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A Second-Order Sigma-Delta Modulator with Built-in VGA to Improve SNR and Harmonic Distortion
Ann Arbor, Michigan March 04-March 06
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/GLSV.1999.757460Ninth Great Lakes Symposium on VLSI
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Xiaopeng Li, Mohammed Ismail, "A Second-Order Sigma-Delta Modulator with Built-in VGA to Improve SNR and Harmonic Distortion," Great Lakes Symposium on VLSI, pp. 376, Ninth Great Lakes Symposium on VLSI, 1999.
 
 
BibTex
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@article{ 10.1109/GLSV.1999.757460,
author = {Xiaopeng Li and Mohammed Ismail},
title = {A Second-Order Sigma-Delta Modulator with Built-in VGA to Improve SNR and Harmonic Distortion},
journal ={Great Lakes Symposium on VLSI},
volume = {0},
year = {1999},
issn = {1066-1395},
pages = {376},
doi = {http://doi.ieeecomputersociety.org/10.1109/GLSV.1999.757460},
publisher = {IEEE Computer Society},
address = {Los Alamitos, CA, USA},
}
 
 
RefWorks Procite/RefMan/Endnote
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TY - CONF
JO - Great Lakes Symposium on VLSI
TI - A Second-Order Sigma-Delta Modulator with Built-in VGA to Improve SNR and Harmonic Distortion
SN - 1066-1395
SP
EP
A1 - Xiaopeng Li,
A1 - Mohammed Ismail,
PY - 1999
VL - 0
JA - Great Lakes Symposium on VLSI
ER -
 
Xiaopeng Li, Ohio State University
Mohammed Ismail, Ohio State University
A modified architecture of the second-order switched-capacitor modulator is proposed. A simple four-transistor variable gain attenuator is included in the architecture which continuously adjusts the reference voltage of the quantizer feedback. This improves the output SNR for small signal input and reduces the harmonic distortion for large signal input. Simulation results show that it achieves higher dynamic range and lower harmonic distortions compared with the traditional architecture.
Citation:
Xiaopeng Li, Mohammed Ismail, "A Second-Order Sigma-Delta Modulator with Built-in VGA to Improve SNR and Harmonic Distortion," glsvlsi, pp.376, Ninth Great Lakes Symposium on VLSI, 1999
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