On the design and analysis of the 4th-order leapfrog sigma-delta modulator

Kuei Chih Lin, Chuan Hsi Liu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

In this paper, a novel methodology for designing and analyzing high performance sigma-delta leapfrog modulators for ultra-high resolution analog-to-digital (A/D) converters is presented. The less sensitive topology, the leapfrog topology, in component variations is analyzed by considering the noise transfer function (NTF). By using theoretical analysis, the loop coefficients are constrained to a small, clear and definite range called the stable region. With the output voltage limited within + 2V, an absolutely stable region (ASR) is obtained. A program that analyzes and generates the required coefficients is constructed for easily designing this topology. For a 256 over-sampling ratio (OSR) and the coefficients from ASR, the signal to noise ratio (SNR) and dynamic range (DR) are 105 dB and 100 dB, respectively. In accordance with the behavior simulation results, the system is not only stable and efficient but also suitable for high-resolution applications.

Original languageEnglish
Title of host publication2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings - Circuits and Systems
Pages2304-2308
Number of pages5
Volume4
DOIs
Publication statusPublished - 2006
Externally publishedYes
Event2006 International Conference on Communications, Circuits and Systems, ICCCAS - Guilin, China
Duration: 2006 Jun 252006 Jun 28

Other

Other2006 International Conference on Communications, Circuits and Systems, ICCCAS
CountryChina
CityGuilin
Period06/6/2506/6/28

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Lin, K. C., & Liu, C. H. (2006). On the design and analysis of the 4th-order leapfrog sigma-delta modulator. In 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings - Circuits and Systems (Vol. 4, pp. 2304-2308). [4064385] https://doi.org/10.1109/ICCCAS.2006.285138