A 0.3-V Current-Mode Asynchronous Delta-Sigma Modulator for Wireless Sensor Nodes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F26%3A0200117" target="_blank" >RIV/00216305:26220/26:0200117 - isvavai.cz</a>
Result on the web
<a href="https://ieeexplore.ieee.org/document/11204730" target="_blank" >https://ieeexplore.ieee.org/document/11204730</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/TCSI.2025.3614591" target="_blank" >10.1109/TCSI.2025.3614591</a>
Alternative languages
Result language
angličtina
Original language name
A 0.3-V Current-Mode Asynchronous Delta-Sigma Modulator for Wireless Sensor Nodes
Original language description
This work presents an ultralow-voltage and ultralow-power current-mode delta-sigma modulator designed for biomedical applications. To implement both the integrator and quantizer of the modulator, a bulk-driven current conveyor circuit is introduced. By satisfying the Barkhausen criterion, the proposed modulator can intrinsically oscillate, producing a pulse-density modulated (PDM) output. This clock-less operation avoids conventional quantization noise associated with discrete-time sampling. The current-mode design not only provides improved matching properties and a wider bandwidth but also simplifies the implementation of passive components, resulting in a smaller silicon area compared to voltage-mode modulators-though this area efficiency is partly achieved using off-chip components. The circuit has been fabricated using standard TSMC 0.18-mu m CMOS technology, occupying a silicon area of 226 mu m x 264 mu m. Despite consuming only 34 nW of power, experimental results demonstrate a signal-to-noise and distortion ratio of 57.1 dB, corresponding to an effective resolution of 9.2 bits with a bandwidth of 81 Hz. Additionally, the use of the bulk-driven method achieves an input dynamic range of +/- 24 nA under a supply voltage of 0.3 V.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
ISSN
1549-8328
e-ISSN
1558-0806
Volume of the periodical
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Issue of the periodical within the volume
October 2025
Country of publishing house
US - UNITED STATES
Number of pages
13
Pages from-to
1-13
UT code for WoS article
001598250600001
EID of the result in the Scopus database
2-s2.0-105019560204