An integrated receiver–time-to-digital converter (TDC) chip set is developed for pulsed time-of-flight (TOF) laser rangefinding. The receiver detects the current pulse from the optical detector and produces a timing mark for the TDC. The receiver uses time mode walk error compensation scheme achieving <±2.5-mm residual timing-walk error within a dynamic range of ~1:40 000. The multichannel TDC measures the time position, width, and rise time of the echo pulses simultaneously with ~10-ps precision. Both chips are manufactured in 0.35- $\mu \text{m}$ complementary metal–oxide–semiconductor (CMOS) technology. The functionality of the chip set was demonstrated in a laser radar platform using 12 W and 3-ns optical pulses produced by a laser diode (LD). Measurement accuracy of ~ ±3 mm was achieved with noncooperative targets at a distance range of a few tens of meters within an amplitude range of received echoes of 1:40 000.

中文翻译：

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CMOS 接收器——用于精确脉冲 TOF 激光测距的 TDC 芯片组

为脉冲飞行时间 (TOF) 激光测距开发了一种集成的接收器时间数字转换器 (TDC) 芯片组。接收器检测来自光检测器的电流脉冲，并为 TDC 生成一个时间标记。接收器使用时间模式游走误差补偿方案，在 ~1:40 000 的动态范围内实现 <±2.5-mm 的残余时序游走误差。多通道 TDC 测量回波脉冲的时间位置、宽度和上升时间~10 ps 精度。两种芯片均采用 0.35- $\mu \text{m}$ 互补金属氧化物半导体 (CMOS) 技术制造。该芯片组的功能在一个激光雷达平台上进行了演示，该平台使用由激光二极管 (LD) 产生的 12 W 和 3 ns 光脉冲。