Time-frequency analysis

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A Compact Phase-Domain Delta–Sigma Time-to-Digital Converter With 8.5-ps Resolution for LiDAR Applications
A Compact Phase-Domain Delta–Sigma Time-to-Digital Converter With 8.5-ps Resolution for LiDAR Applications 150 150
Author(s): Yoondeok Na, Myung-Jae Lee, Youngcheol Chae

Abstract:

This letter introduces a compact, high-resolution time-to-digital converter (TDC) for lidar applications. In contrast to a conventional histogram-based peak detection method, this letter proposes a mean detection method using a highly digitized phase-domain delta–sigma (PD $\Delta \Sigma$ ) TDC. The proposed TDC operates in an incremental $\Delta \Sigma $ manner for …

Published in: IEEE Solid-State Circuits Letters
Page(s): 127 – 130
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3382594
Publisher: IEEE

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A Wideband Low-Noise Linear LiDAR Analog Front-End Achieving 1.6-GHz Bandwidth, 2.7-pA/Hz0.5 Input-Referred Noise, and 103-dBΩ Transimpedance Gain
A Wideband Low-Noise Linear LiDAR Analog Front-End Achieving 1.6-GHz Bandwidth, 2.7-pA/Hz0.5 Input-Referred Noise, and 103-dBΩ Transimpedance Gain 150 150
Author(s): Zhao Zhang, Yidan Zhang, Yiqing Xu, Xinyu Shen, Guike Li, Nan Qi, Jian Liu, Nanjian Wu, Liyuan Liu

Abstract:

This letter presents a low-noise wideband analog front-end (AFE) circuit for long-range linear LiDAR. The nMOS feedforward transimpedance amplifier with inner feedback resistor (NFFR-TIA) is proposed to extend the bandwidth to around 400 MHz and reduce the input referred noise (IRN) concurrently with high-transimpedance gain and improved stability. Two stage continuous-time …

Published in: IEEE Solid-State Circuits Letters
Page(s): 131 – 134
Year of Publication: 2024
Electronic ISSN: 2573-9603
DOI: 10.1109/LSSC.2024.3378093
Publisher: IEEE

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