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A 30-frames per s 252 144 SPAD Flash LiDAR With1728 Dual-Clock 488-ps TDCs and
一款252×144 SPAD像素传感器，采用180nm CMOS工艺，支持30帧/秒的闪光LiDAR成像。
180nm CMOS, 48.8ps TDC分辨率, 28.5μm像素间距, 30帧/秒, 50m测距精度8.8cm
SPAD闪光LiDAR时间数字转换器单光子计数直方图处理
▸1728个双时钟架构的12位TDC，分辨率48.8ps
▸碰撞检测总线实现资源高效共享，填充因子28%
▸集成直方图处理的3.32Mb SRAM压缩方案
Abstract
A 252 × 144 single-photon avalanche diode (SPAD)
pixel sensor, called Ocelot, is reported for light detection and
ranging (LiDAR). The sensor, fabricated in the 180-nm CMOS
technology, features 1728 12-bit time-to-digital converters (TDCs)
with 48.8-ps resolution (LSB). Each 126 pixels in a half-column
are connected to six TDCs through a collision detection bus,
which enables effective sharing of resources, and consequently a
fill factor of 28% with a pixel pitch of 28.5 μm. The column-
parallel