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首页> 外文期刊>Instrumentation and Measurement, IEEE Transactions on >A Multichannel High-Precision CMOS Time-to-Digital Converter for Laser-Scanner-Based Perception Systems
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A Multichannel High-Precision CMOS Time-to-Digital Converter for Laser-Scanner-Based Perception Systems

机译：用于基于激光扫描仪的感知系统的多通道高精度CMOS时间数字转换器

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摘要

A multichannel time-to-digital converter (TDC) implemented with 0.35-$mu hbox{m}$ complementary metal–oxide–semiconductor technology that uses a low-frequency crystal as reference and measures the time intervals with counter and delay line interpolation techniques is described. The multichannel measurement architecture provides information on the time intervals between several timing signals. The circuit can be used for laser time-of-flight distance measurements, e.g., where it can determine time intervals between a transmitted laser pulse and several reflected pulses and also pulsewidths or rise times, to compensate for the timing walk error. This paper shows how several measurement channels can be integrated into one TDC without losing the measurement performance. The circuit offers a measurement precision that is better than 8 ps and a measurement range of up to 74 $muhbox{s}$. In terms of laser distance measurement, its performance is equivalent to millimeter-level precision within an 11-km range.
机译：采用0.35- $ mu hbox {m} $互补金属氧化物半导体技术实现的多通道时间数字转换器（TDC），该技术使用低频晶体作为参考，并通过计数器和延迟线插值技术测量时间间隔描述。多通道测量架构可提供有关几个定时信号之间时间间隔的信息。该电路可用于激光飞行时间距离测量，例如，它可确定发射的激光脉冲与几个反射脉冲之间的时间间隔以及脉冲宽度或上升时间，以补偿定时步进误差。本文说明了如何在不损失测量性能的情况下将多个测量通道集成到一个TDC中。该电路提供了优于8 ps的测量精度，测量范围高达74 $ muhbox {s} $。就激光测距而言，其性能相当于11公里范围内的毫米级精度。

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