DYNAMIC OUTPUT BIAS SIGNAL FOR A SINGLE PHOTON AVALANCHE DIODE (SPAD) BASED PHOTON DETECTION CIRCUIT
卷宗概要
申请人
STMicroelectronics International N.V.; University of Edinburgh
发明人
Maciej WOJTKIEWICZ; Bruce RAE; Robert HENDERSON
IPC 分类
CPC 分类
An example photon detection circuit, a SPAD sensing device, and a direct time-of-flight detection system comprising a SPAD sensing device configured to operate in a high illumination environments, are provided. The example photon detection circuit includes SPAD circuitry configured to generate a photon detection signal based on a SPAD bias voltage and the number of photons encountering the SPAD. The photon detection circuitry further includes output bias circuitry configured to generate a dynamic output bias signal, wherein the dynamic output bias signal is updated based on the number of photons encountering the SPAD. The example photon detection circuitry further includes output signal circuitry configured to generate a photon detection output signal in an instance in which the photon detection signal exceeds an output signal circuitry threshold, wherein the output signal circuitry threshold is based on the dynamic output bias signal.
原文（中文）
An example photon detection circuit, a SPAD sensing device, and a direct time-of-flight detection system comprising a SPAD sensing device configured to operate in a high illumination environments, are provided. The example photon detection circuit includes SPAD circuitry configured to generate a photon detection signal based on a SPAD bias voltage and the number of photons encountering the SPAD. The photon detection circuitry further includes output bias circuitry configured to generate a dynamic output bias signal, wherein the dynamic output bias signal is updated based on the number of photons encountering the SPAD. The example photon detection circuitry further includes output signal circuitry configured to generate a photon detection output signal in an instance in which the photon detection signal exceeds an output signal circuitry threshold, wherein the output signal circuitry threshold is based on the dynamic output bias signal.