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1. (WO2017182272) SIGNAL PROCESSING ARRANGEMENT, SENSOR ARRANGEMENT AND SIGNAL PROCESSING METHOD

Pub. No.:    WO/2017/182272    International Application No.:    PCT/EP2017/058119
Publication Date: Fri Oct 27 01:59:59 CEST 2017 International Filing Date: Thu Apr 06 01:59:59 CEST 2017
IPC: H03M 3/04
H03M 1/12
H03M 1/68
Applicants: AMS AG
Inventors: CHRISTEN, Thomas
STEELE, Colin
FROEHLICH, Thomas
Title: SIGNAL PROCESSING ARRANGEMENT, SENSOR ARRANGEMENT AND SIGNAL PROCESSING METHOD
Abstract:
A signal processing arrangement (100) has a signal input (SI) for connecting a capacitive sensor (CS). An amplifier circuit (AMP) is coupled between the signal input (SI) and a feedback point (CB1). A loop filter (LF) is coupled downstream to the feedback point (CB1). A quantizer (QT) is connected downstream to the loop filter (LF) and provides a multi-bit output word (OW). The multi-bit output word (OW) consists of one or more higher significance bits (HSB) and one or more lower significance bits (LSB). A first feedback path (FB1) is coupled between a quantizer (QT) and the feedback point (CB1) for providing a first feedback signal to the feedback point (CB1) being representative of the one or more lower significance bits (LSB). A second feedback path is coupled to the quantizer (QT) for providing a second feedback signal to the signal input (SI) being representative of the one or more higher significance bits (HSB).