Noise Considerations in Pulse-Shaping Based TIA Channel Designed for a Pulsed TOF Laser Radar Receiver

2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC) Pub Date : 2018-10-01 DOI:10.1109/NORCHIP.2018.8573466

Aram Baharmast, J. Kostamovaara

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引用次数: 5

Abstract

In this study a detailed noise analysis and measurements of a time-of-flight (TOF) laser radar front-end amplifier are presented, in which an LC pulse shaper is combined with the non-linear feedback Trans-Impedance Amplifier in order to achieve a low noise and wide dynamic range TOF receiver. The noise of the receiver limits the single shot precision and sensitivity (i.e., the dynamic range at low end) of the receiver channel. It is shown that the proposed technique shapes the noise generated by various components of the front-end. Furthermore, in order to achieve the best possible noise performance, various compromises over different characteristics of the front-end (walk error, bandwidth) are discussed. The proposed front-end amplifier was fabricated as a part of a TOF receiver chip in a $0.35\,\mu \mathrm {m}$ standard CMOS process and our measurements show a trans-impedance gain of $\sim 122\,\mathrm{dB}\Omega $, a bandwidth of $\sim 200$ MHz, and an input-referred equivalent current noise of $\sim 60$ nA.

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脉冲TOF激光雷达接收机基于脉冲整形TIA通道的噪声考虑

本文对飞行时间(TOF)激光雷达前端放大器进行了详细的噪声分析和测量，其中LC脉冲整形器与非线性反馈跨阻抗放大器相结合，实现了低噪声、宽动态范围的TOF接收机。接收机的噪声限制了接收机信道的单发精度和灵敏度(即低端动态范围)。结果表明，该方法可以有效地抑制前端各部分产生的噪声。此外，为了获得最佳的噪声性能，讨论了前端不同特性(行走误差，带宽)的各种折衷方案。所提出的前端放大器是在$0.35\,\mu \mathrm {m}$标准CMOS工艺中作为TOF接收器芯片的一部分制造的，我们的测量显示反阻抗增益为$\sim 122\,\mathrm{dB}\Omega $，带宽为$\sim 200$ MHz，输入参考等效电流噪声为$\sim 60$ nA。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2018 IEEE Nordic Circuits and Systems Conference (NORCAS): NORCHIP and International Symposium of System-on-Chip (SoC)

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