Linear Integrated Interface for Automatic Differential Capacitive Sensing†
AbstractIn this work, the authors introduce a new full-analog front-end for differential capacitance sensors which provides a DC output voltage, directly proportional to the measurand variations. The readout circuit architecture is based on a De Sauty bridge as core of the capacitive sensing whereas the feedback circuitry performs the bridge autobalancing operation by means of changes in a multiplier output. The circuit is designed in a standard CMOS technology (AMS 0.35 µm) so is suitable for portable systems. Simulated results have shown a good agreement with the theoretical model being the percentage relative error less than 2.5%. Interface sensitivity is constant and values around 0.055 V/mm for the considered application.
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Barile, G.; Ferri, G.; Parente, F.R.; Stornelli, V.; Depari, A.; Flammini, A.; Sisinni, E. Linear Integrated Interface for Automatic Differential Capacitive Sensing. Proceedings 2017, 1, 592.
Barile G, Ferri G, Parente FR, Stornelli V, Depari A, Flammini A, Sisinni E. Linear Integrated Interface for Automatic Differential Capacitive Sensing. Proceedings. 2017; 1(4):592.Chicago/Turabian Style
Barile, Gianluca; Ferri, Giuseppe; Parente, Francesca Romana; Stornelli, Vincenzo; Depari, Alessandro; Flammini, Alessandra; Sisinni, Emiliano. 2017. "Linear Integrated Interface for Automatic Differential Capacitive Sensing." Proceedings 1, no. 4: 592.
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