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A Programmable Correlation Detection Circuit for SPAD-Based LiDAR Applications
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DOI：10.1109/LPT.2025.3647768.png)
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Abstract
En 中文
This letter presents a correlation detection circuit (CDC) with a programmable threshold for noise filtering in single-photon avalanche diode (SPAD)-based light detection and ranging (LiDAR) systems. A four-bit sorter based on combinational logic and an adjustable time window is employed for level-sensitive pulse correlation detection, which increases the pulse detection rate compared to existing edge-counting techniques when there exists pulse merging in a typical OR-Tree receiver structure. The threshold of the CDC is configurable to adapt to different noise strength. Fabricated in a 0.18 mu m CMOS process, the proposed CDC achieves a significant improvement of the effective pulse detection rate by about 10 times in a macro-pixel containing four SPADs, where each SPAD has a typical dark count rate (DCR) of about 1 kHz.
Keywords:
Light detection and ranging (LiDAR)
single-photon avalanche diodes (SPADs)
correlation detection
Journal
I
IF:
2.5
Papers:
273
Citations:
1.5W