Sensorschaltung

Details

Veröffentlichungs-Nr.

EP3139186

Aktenzeichen

EP15183285

Anmeldetag

1. September 2015

Veröffentlichung

1. August 2018

Erteilung

1. August 2018

Rechtsraum

EP

IPC

G01R19/25H03M1/00G01R17/10G01R27/02

Abstract

The disclosure relates to sensor systems, in particular to such systems incorporating analogue to digital converters, for example for use in providing a digital signal derived from sensing elements connected in a bridge configuration. Example embodiments include a sensor circuit (300) comprising: first and second paths (301 a, 301 b) comprising respective first and second sensing elements (R1 a, R2a) connected between first and second supply lines (302a, 302b); an analogue to digital converter (304, 305, 306) having a differential input connected to receive a differential voltage signal (Vinp-Vinn) between the first and second sensing elements (R1 a, R2a) and an output for providing a digital output signal (Dout) representing a difference between the first and second sensing elements (R1 a, R2a), the analogue to digital converter comprising: a plurality of current sources (311 0 ...311 n ) connected between the first and second supply lines (302a, 302b), each current source being switchably connected to either the first or second sensing elements (R1 a, R2a); and control logic (306) configured to selectively switch current from each of the current sources (311 0 ...311 n ) to either the first path (301 a) or the second path (301 b) in dependence on the differential voltage signal (Vinp-Vinn).

Anmelder

Firma

NXP B.V.

Land

🇳🇱 Niederlande

Fachgebiete