Optimization of baseband incremental sigma-delta modulator based on stability and dynamic range

As the demand for sigma-delta (LA) analog-to-digital converters (ADCs) with higher bandwidth and higher signal-to-noise ratio (SNR) be increased, designers have to look for efficient structures with low oversampling ratio (OSR). However, decreasing the oversampling ratio would result in using the la...

Full description

Saved in:

Bibliographic Details
Published in:	2005 International Conference on Microelectronics p. 4 pp.
Main Authors:	Torkzadeh, P., Tajalii, A., Atarodf, M.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 2005
Subjects:	Analog-digital conversion Bandwidth Baseband Baseband Incremental Sigma-Delta Modulator Delta-sigma modulation Dynamic range Frequency domain analysis Optimization methods Output Dynamic Range and Modulator Stability Output Effective Number of Bits (ENOB) Signal design Signal to noise ratio Stability
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	As the demand for sigma-delta (LA) analog-to-digital converters (ADCs) with higher bandwidth and higher signal-to-noise ratio (SNR) be increased, designers have to look for efficient structures with low oversampling ratio (OSR). However, decreasing the oversampling ratio would result in using the larger coefficients amounts in the modulator structure which jeopardize the modulator stability and its performance. In this paper, the total aspects of general order incremental sigma-delta (LA) modulators are analyzed. The operating principles of modulator and the main parameters like output dynamic range (DR), output effective number of bits (ENOB) and stability, in the time and frequency domain would be calculated and eventually the optimizing method based on an unconditional stability for modulator with maximum output dynamic range will be presented. All of derivations have been calculated for general order modulators. Simulation results in each section verify the trueness and precision of calculated parameters.
ISBN:	0780392620 9780780392625
ISSN:	2159-1660
DOI:	10.1109/ICM.2005.1590036