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Geiger mode APD light receiver having an active readout forming a virtual short-circuit
Geiger mode APD light receiver having an active readout forming a virtual short-circuit
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机译:Geiger模式APD光接收器具有有效的读数,可形成虚拟短路
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摘要
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).
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机译:具有多个雪崩光电二极管元件( 10、12 B> a I>- c I)的光接收器( 10、50 B>) >),它们被偏置电压大于突破电压,因此以盖革模式工作,以便在光接收时触发盖革电流,并具有信号检测电路( 50 B>)读取雪崩光电二极管元件( 10,12 B> a I>- c I>),其中信号检测电路( 50 B >)包括一个有源耦合元件( 52 B>),其输入( 54 B>)连接到雪崩光电二极管元件( 10、12 B> a I>- c I>)和输出( 56 B>),有源耦合元件( 52 B>)将盖革电流映射到输入( 54 B>)到与盖革电流在其行程和水平上相对应的测量电流,其中输入( 54 B>)形成盖革电流的虚拟短路,其中相对于电位(接地,-U BE Sub>; U const Sub> -U BE Sub>),输出( 56 B>)与输入( 54 B>)解耦。
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