 |
HAL-LIRMM - Open Archive |  |
Journal articles
A fully-digital and ultra-low-power front-end for differential capacitive sensors
Abstract : In this paper, we present a simple, compact and low-power interface for differential capacitive sensors with a direct digital output. The complete system is composed with a current to voltage converter, an integrator, a comparator and a one-bit digital to analog converter as a feedback. The so-obtained Sigma―Delta modulator is able to deliver directly a bit stream with a ratio of logical `1' directly proportional to the differential capacitance to be measured. A partially integrated prototype has been realized to demonstrate accuracy and non-linearity compatible with a 9-bit sensor.
Keywords :
Voltage converter
Digital output
https://hal-lirmm.ccsd.cnrs.fr/lirmm-01272416
Contributor : Caroline Lebrun <>
Submitted on : Wednesday, February 10, 2016 - 5:41:07 PM
Last modification on : Thursday, June 4, 2020 - 10:27:18 AM
Contributor : Caroline Lebrun <>
Submitted on : Wednesday, February 10, 2016 - 5:41:07 PM
Last modification on : Thursday, June 4, 2020 - 10:27:18 AM
