Integrierte Schaltung und Messverfahren

Details

Veröffentlichungs-Nr.

EP3786912

Aktenzeichen

EP19193888

Anmeldetag

27. August 2019

Veröffentlichung

6. Dezember 2023

Erteilung

6. Dezember 2023

Rechtsraum

EP

IPC

G08B13/26G01R27/26G08B13/24G08B29/04// G01D5/24G09F3/03

Abstract

In accordance with a first aspect of the present disclosure, an integrated circuit (204) is provided, comprising a current source (206) and a reference capacitor (208), the integrated circuit being configured to: inject, using said current source, a first current in an external measurement capacitor (202) and determine a first amount of time within which a resulting voltage on the measurement capacitor reaches a voltage threshold; inject, using said current source, a second current in the reference capacitor and determine a second amount of time within which a resulting voltage on the reference capacitor reaches said voltage threshold; detect a change of the capacitance on the measurement capacitor using a difference between the first amount of time and the second amount of time. In accordance with a second aspect of the present disclosure, a corresponding measurement method is conceived.

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete