Título:
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Low-power direct resistive sensor-to-microcontroller interfaces
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Autor/a:
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López Lapeña, Oscar; Serrano Finetti, Roberto Ernesto; Casas Piedrafita, Óscar
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Otros autores:
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Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica; Universitat Politècnica de Catalunya. GRUP ISI - Grup d'Instrumentació, Sensors i Interfícies |
Abstract:
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Abstract:
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This paper analyzes the energy consumption of
direct interface circuits where the data conversion of a resistive
sensor is performed by a direct connection to a set of digital ports
of a microcontroller (µC). The causes of energy consumption
as well as their relation to the measurement specifications in
terms of uncertainty are analyzed. This analysis yields a tradeoff
between energy consumption and measurement uncertainty,
which sets a design procedure focused on achieving the lowest
energy consumption for a given uncertainty and a measuring
range. Together with this analysis, a novel experimental setup is
proposed that allows one to measure the µC’s timer quantization
uncertainty. An application example is shown where the design
procedure is applied. The experimental results fairly fit the
theoretical analysis, yielding only 5 µJ to achieve nine effective
number of bits (ENOB) in a measuring range from 1 to 1.38 k.
With the same ENOB, the energy is reduced to 1.9 µJ when the
measurement limits are changed to 100 and 138 k. |
Abstract:
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Peer Reviewed |
Materia(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació -Detectors -Microcontrollers -Energy consumption -microcontrollers (µC) -powerless sensor nodes -resistive sensors -radio-frequency identifier -sensor electronic interface -Detectors -Microcontroladors |
Derechos:
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Tipo de documento:
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Artículo - Versión publicada Artículo |
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