公开(公告)号：US20170308219A1

公开(公告)日：2017-10-26

申请号：US15138152

申请日：2016-04-25

Applicant: Atmel Corporation

Inventor： Arne Aas ,  Torbjorn Viksand

IPC: G06F3/041 ,  G06F3/044

CPC classification number: G06F3/0416 ,  G06F3/044 ,  G06F2203/04107

Abstract: In an embodiment, a circuit comprises: an analog driver operable to drive a sensor voltage on a capacitive sensor; a digital driver; a shield drive control coupled to the analog driver and the digital driver, the shield drive control operable to: during a one or more phases of a capacitive measurement of the capacitive sensor, disable the analog driver and enable the digital driver to drive a driven shield; and during one or more other phases of a capacitive measurement of the capacitive sensor, disable the digital driver and enable the analog driver to drive the driven shield with a driven shield voltage that replicates the sensor voltage.

公开(公告)号：US10025423B2

公开(公告)日：2018-07-17

申请号：US15138152

申请日：2016-04-25

Applicant: Atmel Corporation

Inventor： Arne Aas ,  Torbjorn Viksand

IPC: G06F3/041 ,  G06F3/044

Abstract: In an embodiment, a circuit comprises: an analog driver operable to drive a sensor voltage on a capacitive sensor; a digital driver; a shield drive control coupled to the analog driver and the digital driver, the shield drive control operable to: during a one or more phases of a capacitive measurement of the capacitive sensor, disable the analog driver and enable the digital driver to drive a driven shield; and during one or more other phases of a capacitive measurement of the capacitive sensor, disable the digital driver and enable the analog driver to drive the driven shield with a driven shield voltage that replicates the sensor voltage.