公开(公告)号：US09768798B2

公开(公告)日：2017-09-19

申请号：US15121753

申请日：2015-02-13

Applicant: ams AG

Inventor： Thomas Christen ,  Thomas Froehlich ,  Andreas Fitzi ,  Dusan Prelog

IPC: H03M3/00

CPC classification number: H03M3/422 ,  H03M3/328 ,  H03M3/334 ,  H03M3/424 ,  H03M3/43 ,  H03M3/436 ,  H03M3/438 ,  H03M3/464

Abstract: A delta-sigma modulator (10) comprises a modulator loop (11) and a code generator (12). The modulator loop (11) comprises a loop filter (18). The code generator (12) is configured to generate a generator signal (BS) that is realized as an extended Barker code. The code generator (12) comprises a generator output (23) that is coupled to the loop filter (18).

公开(公告)号：US10523234B2

公开(公告)日：2019-12-31

申请号：US16083206

申请日：2017-04-05

Applicant: ams AG

Inventor： Thomas Christen ,  Colin Steele ,  Thomas Froehlich

IPC: H03M3/00 ,  H03M1/12 ,  H03M1/68

Abstract: A signal processing arrangement has a signal input for connecting a capacitive sensor. An amplifier circuit is coupled between the signal input and a feedback point. A loop filter is coupled downstream to the feedback point. A quantizer is connected downstream to the loop filter and provides a multi-bit output word. The multi-bit output word consists of one or more higher significance bits and one or more lower significance bits. A first feedback path is coupled between a quantizer and the feedback point for providing a first feedback signal to the feedback point being representative of the one or more lower significance bits. A second feedback path is coupled to the quantizer for providing a second feedback signal to the signal input being representative of the one or more higher significance bits.