Title:
DAC-GENERATED DRIVEN SHIELD AND VOLTAGE REFERENCE
Document Type and Number:
WIPO Patent Application WO/2023/021633
Kind Code:
A1
Abstract:
A capacitive sensor system includes a capacitive sensor including a sensing electrode and a shield electrode, a regulator circuit configured to regulate a voltage of the capacitive sensor and to generate an output signal based on an output of the capacitive sensor, a reference signal generator configured to generate a reference signal, supply the reference signal to the capacitive sensor via the regulator circuit, and supply the reference signal to the shield electrode as a driven shield signal, and an offset control module configured to generate an offset signal to modify an output current of the output signal.
Inventors:
VINCENT PAUL (US)
QUIST BRENT (US)
NOALL STEVE (US)
LIU WAYNE (US)
QUIST BRENT (US)
NOALL STEVE (US)
LIU WAYNE (US)
Application Number:
PCT/JP2021/030263
Publication Date:
February 23, 2023
Filing Date:
August 18, 2021
Export Citation:
Assignee:
ALPS ALPINE CO LTD (JP)
International Classes:
G01R27/26
Domestic Patent References:
| WO2021090636A1 | 2021-05-14 | |||
| WO2021106459A1 | 2021-06-03 |
Foreign References:
| US20190294297A1 | 2019-09-26 | |||
| US5466896A | 1995-11-14 | |||
| US20200019265A1 | 2020-01-16 | |||
| US6331780B1 | 2001-12-18 | |||
| US20190257870A1 | 2019-08-22 | |||
| US20210072048A1 | 2021-03-11 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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