Invention Grant
- Patent Title: Proximity sensor with crosstalk compensation
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Application No.: US16628330Application Date: 2018-06-12
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Publication No.: US11294034B2Publication Date: 2022-04-05
- Inventor: Josef Kriebernegg , Chandra Nyshadham , Rahul Thottathil , Hafeez Koonari Thoombath
- Applicant: ams AG
- Applicant Address: AT Premstaetten
- Assignee: ams AG
- Current Assignee: ams AG
- Current Assignee Address: AT Premstaetten
- Agency: MH2 Technology Law Group LLP
- Priority: EP17179779 20170705
- International Application: PCT/EP2018/065476 WO 20180612
- International Announcement: WO2019/007644 WO 20190110
- Main IPC: G01C3/08
- IPC: G01C3/08 ; G01S7/48 ; G01S17/46

Abstract:
A proximity sensor (1) with crosstalk compensation comprises a transmitting circuit (10) to transmit a signal to be reflected at a target (2) and a disturbing object (3), and a receiving circuit (20) to receive a reflected signal (RS) having a useful component (RSI) and a noise component (RS2). The receiving circuit (20) comprises an output node (A20) to provide an output signal (Vout2) in dependence from the distance of the proximity sensor (1) from the target (2). The receiving circuit (20) comprises a crosstalk compensation circuit (100) comprising a first charging circuit (110) to provide a first charge for for coarse crosstalk compensation and a second charging circuit (120) to provide a second charge for fine crosstalk compensation. A control circuit (30) sets an amount of the first and the second charge so that the output signal (Vout2) of the crosstalk compensation circuit (100) is dependent on the useful component (RSI) and independent on the noise component (RS2) of the reflected signal (RS).
Public/Granted literature
- US20200150230A1 PROXIMITY SENSOR WITH CROSSTALK COMPENSATION Public/Granted day:2020-05-14
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