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Single photon avalanche photodiode excess bias control system and method

A single-photon avalanche, photodiode technology, applied in control/regulation systems, photometry, measurement circuits, etc., can solve problems such as complex signal processing circuits

Active Publication Date: 2017-10-24
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021] The above-mentioned high dynamic range photodetector needs to operate between linear mode and Geiger mode, so the corresponding signal processing circuit will be relatively complicated

Method used

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  • Single photon avalanche photodiode excess bias control system and method
  • Single photon avalanche photodiode excess bias control system and method
  • Single photon avalanche photodiode excess bias control system and method

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Embodiment Construction

[0089] Please refer to Figure 9A to Figure 9C , which is a schematic diagram of a single photon avalanche photodiode SPAD detection circuit and its related signals. The single photon avalanche photodiode SPAD detection circuit includes: a power supply 310 , a single photon avalanche photodiode SPAD, and a load R. Wherein, the power supply 310 can generate the supply voltage V op ; The cathode terminal of the single photon avalanche photodiode SPAD receives the supply voltage V op , the anode terminal generates an output voltage signal V in response to receiving photon excitation anode ; The first end of the load is connected to the anode end of the single photon avalanche photodiode SPAD, and the second end of the load is connected to the ground voltage Gnd.

[0090] Assuming that the single photon avalanche photodiode SPAD operates in Geiger mode, the supply voltage V op =V bd +V e , where V bd is the breakdown voltage and V eis the excess bias level. When the singl...

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Abstract

An excess bias control system and method for a single-photon avalanche photodiode. The system includes: a power supply to generate a supply voltage; the single-photon avalanche photodiode has a first end to receive the supply voltage and a second end to generate an output voltage. a signal; a control circuit connected to the second terminal of the single-photon avalanche photodiode, wherein the control circuit generates a reset level based on changes in the output voltage signal and an excess bias level; and a load having a first A terminal is connected to the second terminal of the single photon avalanche photodiode, and a second terminal is connected to the control circuit to receive the reset level.

Description

technical field [0001] The disclosure is a diode bias control system and method, and particularly relates to a single photon avalanche photodiode (single photon avalanche photo diode) excess bias control system and method. Background technique [0002] In general, photo detectors can be further divided into general photodiodes (PD for short), avalanche photodiodes (APD for short), and single photon avalanche photodiodes (single photon avalanche photodiodes) according to their operating forms. Photon avalanche photo diode, referred to as SPAD). [0003] Please refer to figure 1 , which is shown as a schematic diagram of the bias voltage operating range of various photodetectors and their optical gain. A general photodiode PD operates in a region with a relatively low reverse bias value, so the optical gain is not high, and one photon excites at most one electron-hole pair. [0004] The avalanche photodiode APD operates in linear mode, and its operating point voltage, or bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG01J1/44G01J2001/442G01J2001/4466H04N25/773
Inventor 蔡嘉明章博璿郭明清杨子毅
Owner IND TECH RES INST