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Applicability of Field Programmable Analog Arrays to Capacitive Sensing in the Sub-pF Range

Applicability of Field Programmable Analog Arrays to Capacitive Sensing in the Sub-pF Range
Applicability of Field Programmable Analog Arrays to Capacitive Sensing in the Sub-pF Range
FPAAs have recently been introduced to reduce analog design costs and bridge the gap between ASICs and circuits made of standard-parts. Here, their applicability to capacitive sensing is investigated. Switched-mode FPAAs were not originally introduced for the readout of elementary sensors or their desensitization from parasitics. Nonetheless, we show that specific techniques can make them up to the task of reading capacitance variations in the tens fF range. We also show that FPAA sensor interfaces can achieve automatic, trimmer-free calibration by FPAA reconfiguration. We conclude by illustrating a sample application as a proof-of-concept of the proposed techniques.
39-51
Callegari, S.
9177fe57-51b6-4394-8f5f-229433124b79
Merendino, G.
eb5829ef-cb28-4cf8-bc37-8357bff07337
Golfarelli, A.
91a77beb-cfb6-4d80-9326-859e54e8c1a9
Zagnoni, M.
c719a8d2-cd85-4d22-a669-eb0557b3aa95
Tartagni, M.
dfdda9ee-a432-4a57-bde4-e538b963600f
Callegari, S.
9177fe57-51b6-4394-8f5f-229433124b79
Merendino, G.
eb5829ef-cb28-4cf8-bc37-8357bff07337
Golfarelli, A.
91a77beb-cfb6-4d80-9326-859e54e8c1a9
Zagnoni, M.
c719a8d2-cd85-4d22-a669-eb0557b3aa95
Tartagni, M.
dfdda9ee-a432-4a57-bde4-e538b963600f

Callegari, S., Merendino, G., Golfarelli, A., Zagnoni, M. and Tartagni, M. (2006) Applicability of Field Programmable Analog Arrays to Capacitive Sensing in the Sub-pF Range. Analog Integrated Circuits and Signal Processing, 47, 39-51.

Record type: Article

Abstract

FPAAs have recently been introduced to reduce analog design costs and bridge the gap between ASICs and circuits made of standard-parts. Here, their applicability to capacitive sensing is investigated. Switched-mode FPAAs were not originally introduced for the readout of elementary sensors or their desensitization from parasitics. Nonetheless, we show that specific techniques can make them up to the task of reading capacitance variations in the tens fF range. We also show that FPAA sensor interfaces can achieve automatic, trimmer-free calibration by FPAA reconfiguration. We conclude by illustrating a sample application as a proof-of-concept of the proposed techniques.

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Published date: 2006
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 264505
URI: http://eprints.soton.ac.uk/id/eprint/264505
PURE UUID: 0a35ccee-ef14-4a25-8af7-f731f6b698da

Catalogue record

Date deposited: 14 Sep 2007
Last modified: 16 Jul 2019 22:38

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Contributors

Author: S. Callegari
Author: G. Merendino
Author: A. Golfarelli
Author: M. Zagnoni
Author: M. Tartagni

University divisions

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