12.6 A 160nW 63.9fJ/conversion-step capacitance-to-digital converter for ultra-low-power wireless sensor nodes

Author

Hyunsoo Ha ; Sylvester, Dennis ; Blaauw, D. ; Jae-Yoon Sim

Author_Institution

Pohang Univ. of Sci. & Technol., Pohang, South Korea

fYear

2014

fDate

9-13 Feb. 2014

Firstpage

220

Lastpage

221

Abstract

Recent advances in nW-level wireless sensor nodes have created opportunities in emerging applications such as bio-implantable telemetry, smart healthcare, and environmental monitoring [1]. At the same time, there are many circuit and system design challenges to achieving high functionality in such ultra-low-power microsystems. One of the key sensing modalities in these systems is capacitive sensing. With zero static current during signal readout, capacitive sensing is well suited to ultra-low-power microsystems and has been widely adopted in the sensing of pressure [2,3], displacement [4], and humidity [5].

Keywords

capacitive sensors; convertors; displacement measurement; humidity sensors; low-power electronics; pressure sensors; wireless sensor networks; bio-implantable telemetry; capacitive sensing; circuit design; conversion-step capacitance-to-digital converter; displacement sensing; energy 63.9 fJ; environmental monitoring; humidity sensing; power 160 nW; pressure sensing; smart healthcare; system design; ultra-low-power microsystems; ultra-low-power wireless sensor nodes; zero static current during signal readout; Biosensors; Capacitance; Capacitive sensors; Capacitors; Linearity; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2014 IEEE International

Conference_Location

San Francisco, CA

ISSN

0193-6530

Print_ISBN

978-1-4799-0918-6

Type

conf

DOI

10.1109/ISSCC.2014.6757408

Filename

6757408