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J. Low Power Electron. Appl., Volume 2, Issue 3 (September 2012), Pages 197-209

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Research

Open AccessArticle A Low-Power Single-Bit Continuous-Time ΔΣ Converter with 92.5 dB Dynamic Range for Biomedical Applications
J. Low Power Electron. Appl. 2012, 2(3), 197-209; doi:10.3390/jlpea2030197
Received: 5 April 2012 / Revised: 6 July 2012 / Accepted: 9 July 2012 / Published: 26 July 2012
Cited by 4 | PDF Full-text (481 KB) | HTML Full-text | XML Full-text
Abstract
A third-order single-bit CT-ΔΣ modulator for generic biomedical applications is implemented in a 0.15 µm FDSOI CMOS process. The overall power efficiency is attained by employing a single-bit ΔΣ and a subthreshold FDSOI process. The loop-filter coefficients are determined using a systematic design
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A third-order single-bit CT-ΔΣ modulator for generic biomedical applications is implemented in a 0.15 µm FDSOI CMOS process. The overall power efficiency is attained by employing a single-bit ΔΣ and a subthreshold FDSOI process. The loop-filter coefficients are determined using a systematic design centering approach by accounting for the integrator non-idealities. The single-bit CT-ΔΣ modulator consumes 110 µW power from a 1.5 V power supply when clocked at 6.144 MHz. The simulation results for the modulator exhibit a dynamic range of 94.4 dB and peak SNDR of 92.4 dB for 6 kHz signal bandwidth. The figure of merit (FoM) for the third-order, single-bit CT-ΔΣ modulator is 0.271 pJ/level. Full article
(This article belongs to the Special Issue Selected Papers from SubVt 2011 Conference)
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