Schaltungsanordnung für einen Berührungssensor

Details

Veröffentlichungs-Nr.

EP4428661

Aktenzeichen

EP23160219

Anmeldetag

6. März 2023

Veröffentlichung

19. November 2025

Erteilung

19. November 2025

Rechtsraum

EP

IPC

G06F3/041G06F3/044H03K17/96

Abstract

A circuit arrangement for a touch sensor comprising:a plurality of capacitive sensors configured to measure over a respective sampling period for detecting a touch event on a surface and provide an output;an ADC to receive the output of the capacitive sensors and determine a digital value over a conversion period;a first switch arrangement configured to selectively provide the output from the capacitive sensors to the ADC;a controller configured to:activate a first capacitive sensor to measure the capacitance for detecting a touch event and activate a second capacitive sensor for detecting a touch event such that the respective sampling periods are at least partly concurrent, and configured to control the first switch arrangement to cause the ADC to receive the output of the first capacitive sensor after its sampling time and receive the output of the second capacitive sensor after its sampling time.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete