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A comparison between two different FPGA-based topologies of first order sigma-delta modulator


Citation

Hamadani, Maral Faghani and Mohd Isa, Maryam and Hamidon, Mohd Nizar and Mazaheri, Amin (2015) A comparison between two different FPGA-based topologies of first order sigma-delta modulator. In: 2015 IEEE International Circuits and Systems Symposium (ICSyS 2015), 2-4 Sept. 2015, Holiday Villa Beach Resort & Spa, Langkawi, Kedah. (pp. 120-124).

Abstract

Integrating sigma-delta modulator (SDM) in FPGA causes to have quantization noise inside interested bandwidth. This paper compares and analyzes between two possible FPGA-based SDM structures which are non-noise shaper SDM and noise-shaper SDM. The difference between these two structures is in the integrator block. All other SDM constitutive components are the same for both structures. First-order noise-shaper SDM with its maximum integration for FPGA implementation is reported. The advantages of noise-shaper SDM over non-noise shaper SDM are the elimination of input peak signal error as well as the increment of input voltage range. Moreover, higher suppression in signal harmonics results in better reconstruction of input signal at the output. However, the most important outcome is the improvement of quantization noise shaping out of the interested bandwidth which results higher SNR at the output.


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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1109/CircuitsAndSystems.2015.7394077
Publisher: IEEE
Keywords: SDM topology; Sigma-delta modulator; FPGA
Depositing User: Nabilah Mustapa
Date Deposited: 20 Mar 2018 02:39
Last Modified: 20 Mar 2018 02:39
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1109/CircuitsAndSystems.2015.7394077
URI: http://psasir.upm.edu.my/id/eprint/59712
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