A 0.3-V Current-Mode Asynchronous Delta-Sigma Modulator for Wireless Sensor Nodes

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

A 0.3-V Current-Mode Asynchronous Delta-Sigma Modulator for Wireless Sensor Nodes

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

A 0.3-V Current-Mode Asynchronous Delta-Sigma Modulator for Wireless Sensor Nodes

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS

ISSN

1549-8328

e-ISSN

1558-0806

Svazek periodika

—

Číslo periodika v rámci svazku

October 2025

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

1-13

Kód UT WoS článku

001598250600001

EID výsledku v databázi Scopus

2-s2.0-105019560204