Photodetector

• Main Authors: AZUMA KENTA, KIMURA TEIYU, KASHIWADA SHINJI, OZAKI NORIYUKI, TAKAI ISAMU, HATA TAKEHIRO, MATSUBARA HIROYUKI
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

The invention relates to a photodetector. The photodetector (1A) is equipped with a detection unit (10) configured so as to perform photodetection by applying a reverse bias voltage to a SPAD (4), a monitor SPAD (12) having the same properties as does the SPAD constituting the detection unit, an electric current supply (14) for operating in Geiger mode by supplying a constant current to the monitor SPAD, and a voltage generation unit (18) for generating a reverse bias voltage to be applied to the detection unit SPAD, on the basis of a prescribed excess voltage and a reference breakdown voltageset on the basis of the breakdown voltage produced between the two ends of the monitor SPAD. 本发明涉及光检测器。光检测器(1A)具备：检测部(10)，构成为对SPAD(4)施加反向偏压来进行光检测；监视器用SPAD(12)，具有与构成检测部的SPAD同样的特性；电流源(14)，向监视器用SPAD供给恒定电流使监视器用SPAD以盖革模式进行动作；以及电压生成部(18)，基于根据在监视器用SPAD的两端间产生的击穿电压设定的基准击穿电压和规定的过电压来生成施加到检测部的SPAD的反向偏压。