An integrated energy-efficient capacitive sensor digital interface circuit

Handle URI:
http://hdl.handle.net/10754/322003
Title:
An integrated energy-efficient capacitive sensor digital interface circuit
Authors:
Omran, Hesham ( 0000-0002-0117-7364 ) ; Arsalan, Muhammad; Salama, Khaled N. ( 0000-0001-7742-1282 )
Abstract:
In this paper, we propose an energy-efficient 13-bit capacitive sensor interface circuit. The proposed design fully relies on successive approximation algorithm, which eliminates the need for oversampling and digital decimation filtering, and thus low-power consumption is achieved. The proposed architecture employs a charge amplifier stage to acheive parasitic insensitive operation and fine absolute resolution. Moreover, the output code is not affected by offset voltages or charge injection. The successive approximation algorithm is implemented in the capacitance-domain using a coarse-fine programmable capacitor array, which allows digitizing wide capacitance range in compact area. Analysis for the maximum achievable resolution due to mismatch is provided. The proposed design is insensitive to any reference voltage or current which translates to low temperature sensitivity. The operation of a prototype fabricated in a standard CMOS technology is experimentally verified using both on-chip and off-chip capacitive sensors. Compared to similar prior work, the fabricated prototype achieves and excellent energy efficiency of 34 pJ/step.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Sensors Lab
Citation:
Omran H, Arsalan M, Salama KN (2014) An integrated energy-efficient capacitive sensor digital interface circuit. Sensors and Actuators A: Physical 216: 43-51. doi:10.1016/j.sna.2014.04.035.
Publisher:
Elsevier
Journal:
Sensors and Actuators A: Physical
Issue Date:
19-Jun-2014
DOI:
10.1016/j.sna.2014.04.035
Type:
Article
ISSN:
09244247
Additional Links:
http://linkinghub.elsevier.com/retrieve/pii/S0924424714002180
Appears in Collections:
Articles; Sensors Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorOmran, Heshamen
dc.contributor.authorArsalan, Muhammaden
dc.contributor.authorSalama, Khaled N.en
dc.date.accessioned2014-06-19T18:31:50Z-
dc.date.available2014-06-19T18:31:50Z-
dc.date.issued2014-06-19en
dc.identifier.citationOmran H, Arsalan M, Salama KN (2014) An integrated energy-efficient capacitive sensor digital interface circuit. Sensors and Actuators A: Physical 216: 43-51. doi:10.1016/j.sna.2014.04.035.en
dc.identifier.issn09244247en
dc.identifier.doi10.1016/j.sna.2014.04.035en
dc.identifier.urihttp://hdl.handle.net/10754/322003en
dc.description.abstractIn this paper, we propose an energy-efficient 13-bit capacitive sensor interface circuit. The proposed design fully relies on successive approximation algorithm, which eliminates the need for oversampling and digital decimation filtering, and thus low-power consumption is achieved. The proposed architecture employs a charge amplifier stage to acheive parasitic insensitive operation and fine absolute resolution. Moreover, the output code is not affected by offset voltages or charge injection. The successive approximation algorithm is implemented in the capacitance-domain using a coarse-fine programmable capacitor array, which allows digitizing wide capacitance range in compact area. Analysis for the maximum achievable resolution due to mismatch is provided. The proposed design is insensitive to any reference voltage or current which translates to low temperature sensitivity. The operation of a prototype fabricated in a standard CMOS technology is experimentally verified using both on-chip and off-chip capacitive sensors. Compared to similar prior work, the fabricated prototype achieves and excellent energy efficiency of 34 pJ/step.en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://linkinghub.elsevier.com/retrieve/pii/S0924424714002180en
dc.rightsArchived with thanks to Sensors and Actuators A: Physicalen
dc.subjectCDCen
dc.subjectADCen
dc.titleAn integrated energy-efficient capacitive sensor digital interface circuiten
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentSensors Laben
dc.identifier.journalSensors and Actuators A: Physicalen
dc.eprint.versionPre-printen
dc.contributor.institutionEngineering Mathematics Department, Faculty of Engineering, Cairo University, Giza, Egypten
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorOmran, Heshamen
kaust.authorArsalan, Muhammaden
kaust.authorSalama, Khaled N.en
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