Semtech Corporation
Advanced capacitive proximity sensor
Last updated:
Abstract:
A proximity sensor, and a portable device equipped therewith, with at least two sense electrodes, one influencing the other. By reading twice the capacity of one electrode, while either setting the potential of the counter-electrode to guard or letting it float, the sensor of the invention discriminates between a body part, or another electrically equivalent object, and low-permittivity objects.
Status:
Grant
Type:
Utility
Filling date:
21 May 2018
Issue date:
21 Sep 2021