System level design and optimization of single-loop CT sigma-delta modulators for high resolution wideband applications |
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| Affiliation: | 1. Department of Immunology, Tianjin Medical University, Tianjin 300070, China;2. Department of Laboratory Medicine, Xiqing Hospital of Tianjin, Tianjin 300380, China.;3. Department of Laboratory Medicine, The First Hospital of Shanxi Medical University, Taiyuan 030001, China;1. Department of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin, 210 E 24th St, Austin, TX 78712-1085, USA;2. Department of Applied Physics and Applied Mathematics, Columbia University, 500 W. 120th St., New York, NY, 10027, USA;3. Division of Physical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia;4. Division of Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia;5. Institute for Computational Engineering and Science, University of Texas at Austin, 201 E 24th St. Stop C0200, Austin, TX, 78712-1229, USA |
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| Abstract: | In this paper, the main resolution limitations in single-stage continuous-time sigma-delta modulators (CT ΣΔMs) are analytically estimated as the function of system level parameters for wideband applications. The analytical results are supported by simulation results. The power consumption of CT ΣΔMs is also analytically estimated as the function of system level parameters, and then, it is validated by the reported power consumption of several state-of-the-art fabricated prototypes. Based on analytical results, for a targeted resolution and bandwidth, an algorithm is proposed to design the system level parameters of CT ΣΔMs for the minimum power consumption. The estimation of power consumption and the designed parameters match well with the design of best state-of-the-art fabricated modulators. |
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| Keywords: | Σ∆ modulators Resolution of CT Σ∆ modulators Power estimation in CT Σ∆ modulators Continuous-time integrated circuits |
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