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A New Circuit Topology for High-Performance Pulsed Time-of- Flight Laser Radar Receivers

机译：用于高性能脉冲飞行时间激光雷达接收器的新电路拓扑

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摘要

A new circuit topology for pulsed time-of-flight (TOF) laser radar/range-finder receivers to achieve high sensitivity, wide dynamic range and low walk error is presented in this paper. The proposed topology adopts an adaptive structure as pre-amplifier which can work as a trans-impedance amplifier (TIA) or a charge-sensitive amplifier (CSA) depending on the current intensity received by the photodetector. With the help of the adaptive preamplifier, both the dynamic range and the sensitivity can be improved. In addition, a high-accuracy timing discrimination scheme based on converting the incoming unipolar pulse to a bipolar pulse is used to improve the amplitude-dependent timing walk error. Based on the proposed topology, a receiver channel is implemented with a standard 130nm CMOS technology and simulated in Spectre. The CSA and TIA in the receiver channel can share the same core amplifier so that the area and power efficiency are optimized. Simulation results show that the receiver channel achieves an RMS input-referred noise current of 39nA and a timing walk error of ±37ps (±5.6mm in distance) within the wide dynamic range of 1:100000 (100dB), and maximum walk error of ±19mm over the temperature range of -40°C to + 60°C.
机译：为脉冲时间飞行（TOF）激光雷达/测距仪接收器的一种新的电路拓扑，以实现高灵敏度，宽动态范围和低的步行误差本文提出。所提出的拓扑采用根据由所述光检测器接收到的电流强度的自适应结构作为前置放大器可以作为跨阻抗放大器（TIA）或电荷敏感放大器（CSA）工作。与自适应前置放大器的帮助下，无论是动态范围和灵敏度可以被提高。此外，基于传入单极脉冲转换为双极性脉冲高精度定时判别方案用于改善依赖于幅度的定时步行错误。基础上，提出的拓扑结构，接收器信道与一个标准的130nm的CMOS技术实现，并且在幽灵模拟。在接收机中的信道的CSA和TIA可以共享相同的核心放大器，使得面积和功率效率进行了优化。仿真结果表明，该接收机的信道实现的RMS输入参考噪声电流39nA和±37ps的1的宽动态范围内的定时步行误差（±5.6毫米在距离）：100000（100分贝）和最大步行误差±19毫米在温度范围为-40℃至+ 60℃。

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