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 language | English |
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Title of host publication | 2006 International Conference on Communications, Circuits and Systems, ICCCAS, Proceedings - Circuits and Systems |
Pages | 2304-2308 |
Number of pages | 5 |
Volume | 4 |
DOIs | |
Publication status | Published - 2006 |
Externally published | Yes |
Event | 2006 International Conference on Communications, Circuits and Systems, ICCCAS - Guilin, China Duration: 2006 Jun 25 → 2006 Jun 28 |
Other
Other | 2006 International Conference on Communications, Circuits and Systems, ICCCAS |
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Country | China |
City | Guilin |
Period | 2006/06/25 → 2006/06/28 |
ASJC Scopus subject areas
- Electrical and Electronic Engineering