• Patent Title: Driver for switched capacitor circuits
  • Application No.: US14729341
    Application Date: 2015-06-03
  • Publication No.: US09614519B2
    Publication Date: 2017-04-04
  • Inventor: Fabio Sebastiano
  • Applicant: NXP B.V.
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Agent Rajeev Madnawat
  • Priority: EP14175054 20140630
  • Main IPC: H03K3/00
  • IPC: H03K3/00 H03K17/56 G11C27/02 H03F3/00
Driver for switched capacitor circuits
Abstract:
There is described a driver for a switched capacitor circuit (230, 330), the driver comprising (a) a voltage amplifier (210, 310) comprising a signal input (212, 312), a feedback input (214, 314) and an amplifier output (216, 316), and (b) a feedback network (220) coupled between the amplifier output (216, 316) and the feedback input (214, 314). The feedback network comprises a track-and-hold circuit (222) adapted to mask a voltage dip occurring at the amplifier output (216, 316) at the beginning of a switched capacitor circuit charging phase. There is also described a switched capacitor circuit comprising such a driver, a sensor device, and a method of driving a switched capacitor circuit.
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