A Low-Power Multimode Eight-Channel AFE for dToF LiDAR

Yang, Yuye; Liu, Xi; Yang, Ruixuan; Ma, Shuaizhe; Xia, Yifei; Li, Jia; Zhang, Bing; Geng, Li; Li, Dan

doi:10.1109/iscas58744.2024.10557862

2024 IEEE International Symposium on Circuits and Systems (ISCAS) 2024

DOI: 10.1109/iscas58744.2024.10557862

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A Low-Power Multimode Eight-Channel AFE for dToF LiDAR

Yuye Yang,

Xi Liu,

Ruixuan Yang

et al.

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2024

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A Low-Power Optoelectronic Receiver IC for Short-Range LiDAR Sensors in 180 nm CMOS

Choi,

Chon,

Park

2024

Micromachines

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This paper presents a novel power-efficient topology for receivers in short-range LiDAR sensors. Conventionally, LiDAR sensors exploit complex time-to-digital converters (TDCs) for time-of-flight (ToF) distance measurements, thereby frequently leading to intricate circuit designs and persistent walk error issues. However, this work features a fully differential trans-impedance amplifier with on-chip avalanche photodiodes as optical detectors so that the need of the following post-amplifiers and output buffers can be eliminated, thus considerably reducing power consumption. Also, the combination of amplitude-to-voltage (A2V) and time-to-voltage (T2V) converters are exploited to replace the complicated TDC circuit. The A2V converter efficiently processes weak input photocurrents ranging from 1 to 50 μApp which corresponds to a maximum distance of 22.8 m, while the T2V converter handles relatively larger photocurrents from 40 μApp to 5.8 mApp for distances as short as 30 cm. The post-layout simulations confirm that the proposed LiDAR receiver can detect optical pulses over the range of 0.3 to 22.8 m with a low power dissipation of 10 mW from a single 1.8 V supply. This topology offers significant improvements in simplifying the receiver design and reducing the power consumption, providing a more efficient and accurate solution that is highly suitable for short-range LiDAR sensor applications.

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A Low-Power Optoelectronic Receiver IC for Short-Range LiDAR Sensors in 180 nm CMOS

Choi,

Chon,

Park

2024

Micromachines

View full text Add to dashboard Cite

show abstract

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A Low-Power Multimode Eight-Channel AFE for dToF LiDAR

Cited by 1 publication

References 11 publications

A Low-Power Optoelectronic Receiver IC for Short-Range LiDAR Sensors in 180 nm CMOS

A Low-Power Optoelectronic Receiver IC for Short-Range LiDAR Sensors in 180 nm CMOS

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