Invention Grant
- Patent Title: Geiger mode APD light receiver having an active readout forming a virtual short-circuit
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Application No.: US15216086Application Date: 2016-07-21
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Publication No.: US10018505B2Publication Date: 2018-07-10
- Inventor: Klaus Clemens , Gottfried Hug , Stefan Seitz , Sebastian Tschuch
- Applicant: SICK AG
- Applicant Address: DE Waldkirch
- Assignee: SICK AG
- Current Assignee: SICK AG
- Current Assignee Address: DE Waldkirch
- Agency: Nath, Goldberg & Meyer
- Agent Jerald L. Meyer
- Priority: EP15178508 20150727
- Main IPC: G01J1/44
- IPC: G01J1/44 ; G01J1/46 ; G01S7/486 ; H01L31/02 ; H01L27/146 ; H01L31/107

Abstract:
A light receiver (10, 50) having a plurality of avalanche photo diode elements (10, 12a-c) which are biased with a bias voltage greater than a breakthrough voltage and are thus operated in a Geiger mode in order to trigger a Geiger current upon light reception, and having a signal detection circuit (50) for reading out the avalanche photo diode elements (10, 12a-c), wherein the signal detection circuit (50) comprises an active coupling element (52) having an input (54) connected to the avalanche photo diode elements (10, 12a-c) and an output (56), the active coupling element (52) mapping the Geiger current at the input (54) to a measuring current corresponding to the Geiger current in its course and level, wherein the input (54) forms a virtual short-circuit for the Geiger current with respect to a potential (ground, −UBE; Uconst−UBE), and the output (56) is decoupled from the input (54).
Public/Granted literature
- US20170030769A1 Light Receiver with Avalanche Photo Diodes in a Geiger Mode Public/Granted day:2017-02-02
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