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High-linearity front-end circuit for remote grounded capacitive sensors
(2021-02)
Article
Open AccessThis paper presents a novel front-end circuit for remote grounded capacitive sensors. The circuit is insensitive to amplifier input capacitance and stray interconnecting-cable capacitances. It does not rely on neutralization ... -
Electromagnetic rolling mass wave energy harvester for oceanic drifter applications
(Springer, 2022-03-05)
Article
Open AccessOcean monitoring requirements have fomented the evolution of sensor platforms such as Lagrangian drifters, whose autonomy is a critical factor in the design process. Energy Harvesting (EH) has proven to be a sound option ... -
An auto-balancing capacitance-to-pulse-width converter for capacitive sensors
(2021-01)
Article
Open AccessA novel auto-balancing capacitance-to-pulse- width converter (CPC) that uses sinusoidal excitation, and operates in a closed-loop configuration, is presented in this paper. Unlike most of the existing CPCs, the ... -
A tutorial on thermal sensors in the 200th anniversary of the seebeck effect
(2021-10)
Article
Open AccessTwo noteworthy events associated to the physics of thermal sensors were demonstrated and announced in 1821, exactly two hundred years ago. The first event was the Seebeck effect, which led to the development of thermocouples. ... -
BPF-based thermal sensor circuit for on-chip testing of RF circuits
(Multidisciplinary Digital Publishing Institute (MDPI), 2021-01)
Article
Open AccessA new sensor topology meant to extract figures of merit of radio-frequency analog integrated circuits (RF-ICs) was experimentally validated. Implemented in a standard 0.35 µm complementary metal-oxide-semiconductor (CMOS) ... -
Electronic reading of a mechanical gas meter based on dual magnetic sensing
(2021-06-08)
Article
Open AccessThis article proposes a measurement system controlled by a microcontroller unit (MCU) for the electronic reading of a mechanical gas meter. The measurement relies on dual magnetic sensing: (a) low-cost low-power primary ... -
Analysis of a direct microcontroller interface for capacitively coupled resistive sensors
(2021-01-01)
Article
Open AccessA novel approach to directly interface a capacitively coupled resistive sensor to a microcontroller is presented in this article. The existing measurement schemes for such sensors are complex. In addition, the coupling ... -
A microcontroller-based interface circuit for non-linear resistive sensors
(2021)
Article
Open AccessThis article proposes a circuit based on a microcontroller unit (MCU) for the direct measurement and linearization of non-linear resistive sensors, such as thermistors. The measurement relies on an embedded digital timer ... -
A novel general-purpose theorem for the analysis of linear circuits
(Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
Article
Open AccessA novel general-purpose theorem for the analysis of linear circuits is stated and proven in this brief. When applying the proposed theorem, any current (voltage) of interest is determined by finding first an equivalent ... -
A closed-loop capacitance-to-frequency converter for single-element and differential capacitive sensors
(2020-11-01)
Article
Open AccessA novel closed-loop switched-capacitor(SC) capacitance-to-frequency converter (CFC) is presentedin this paper. The proposed CFC is capable of measuring from either a single-element or a differential capacitive sensor, ... -
LED-Based Wake-Up circuit for microcontrollers
(2020-07-15)
Article
Open AccessThis article proposes, analyzes, and tests a wake-up circuit for a microcontroller (MCU) that uses a light-emitting diode (LED), operating as a photodetector, illuminated by a smartphone flashlight. The wake-up circuit ... -
Demodulating AM square signals via a digital timer for sensor applications
(2020-05-01)
Article
Open AccessThis paper evaluates theoretically and experimentally the performance of a timer-based demodulator applied to low-frequency amplitude-modulated (AM) square signals coming from sensor circuits. The demodulator extracts the ...
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