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Timer-Based Demodulator for AM Sensor Signals Applied to an Inductive Displacement Sensor

Author
Reverter, F.; Gasulla, M.
Type of activity
Journal article
Journal
IEEE transactions on instrumentation and measurement
Date of publication
2017-10-01
Volume
66
Number
10
First page
2780
Last page
2788
DOI
https://doi.org/10.1109/TIM.2017.2711918 Open in new window
Repository
http://hdl.handle.net/2117/116556 Open in new window
URL
http://ieeexplore.ieee.org/document/7956204/ Open in new window
Abstract
This paper proposes a novel method for demodulating low-frequency amplitude-modulated (AM) signals provided by sensors. The method relies on a digital timer that carries out the demodulation and digitization simultaneously, without requiring a rectifier, a mixer, a low-pass filter, or an analog-to-digital converter. This timer-based demodulator extracts the amplitude of the AM signal by measuring the period of a reference signal that is altered by the AM signal itself. The period measurement und...
Citation
Reverter, F., Gasulla, M. Timer-Based Demodulator for AM Sensor Signals Applied to an Inductive Displacement Sensor. "IEEE transactions on instrumentation and measurement", 1 Octubre 2017, vol. 66, núm. 10, p. 2780-2788.
Keywords
Demodulator, digital timer, displacement sensor, inductive sensor, sensor interface electronics
Group of research
e-CAT - Electronic Circuits and Transducers

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