• Patent Title: Signal processing arrangement, sensor arrangement and signal processing method
  • Application No.: US16083206
    Application Date: 2017-04-05
  • Publication No.: US10523234B2
    Publication Date: 2019-12-31
  • Inventor: Thomas ChristenColin SteeleThomas Froehlich
  • Applicant: ams AG
  • Applicant Address: AT Premstaetten
  • Assignee: ams AG
  • Current Assignee: ams AG
  • Current Assignee Address: AT Premstaetten
  • Agency: Fish & Richardson P.C.
  • Priority: EP16165986 20160419
  • International Application: PCT/EP2017/058119 WO 20170405
  • International Announcement: WO2017/182272 WO 20171026
  • Main IPC: H03M3/00
  • IPC: H03M3/00 H03M1/12 H03M1/68
Signal processing arrangement, sensor arrangement and signal processing method
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.
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