A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications

Taewoong Kim; Sanghoon Lee; Youngcheol Chae

doi:10.1109/A-SSCC56115.2022.9980728

A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications

Taewoong Kim, Sanghoon Lee, Youngcheol Chae

Department of Electrical and Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

As interest in autonomous driving increases, so does the demand for LiDAR sensors. However, a significant challenge for such a sensor is to achieve both a long distance range and high resolution. The required distance range is about 250 m, and the required resolution at close distance is about 2 cm, so a dynamic range (DR) of more than 80dB is required [1, 2]. The fine resolution at close range is important for safety, but not necessary for objects that are far away. Therefore, the work in [1] uses different types of converters depending on the distance: a time-to-digital converter (TDC) is used only for short ranges (<25m) and an additional analog-to-digital converter (ADC) is used for long ranges (>25m). However, since it uses two types of converters, it has low area efficiency and high complexity, which would impose significant overhead, especially for multi-channel LiDAR sensors. This issue can be addressed in [2] by sharing the hardware (VCOs) between two converters. However, each converter requires different specifications on target ranges and it also requires additional effort to process the data from two converters.

Original language	English
Title of host publication	2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781665471435
DOIs	https://doi.org/10.1109/A-SSCC56115.2022.9980728
Publication status	Published - 2022
Event	2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Taipei, Taiwan, Province of China Duration: 2022 Nov 6 → 2022 Nov 9

Publication series

Name	2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings

Conference

Conference	2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022
Country/Territory	Taiwan, Province of China
City	Taipei
Period	22/11/6 → 22/11/9

Bibliographical note

Funding Information:
This work is supported by Samsung Electronics. efR erences: [1] K. osY hioka et al., “ A 20-ch TDC/ADC ybH rid Architecture LiDAR SoC for 240 × 96 Pielx 200 -m Range Imaging With Smart Accumulation Technique and Residue Quantiiz ng SAR ADC ,” IEEE JSSC, vol. 53, no. 11, pp. 3026-3038, Nov. 2018.

Publisher Copyright:
© 2022 IEEE.

All Science Journal Classification (ASJC) codes

Hardware and Architecture
Signal Processing
Electrical and Electronic Engineering
Safety, Risk, Reliability and Quality
Instrumentation
Computer Networks and Communications

Access to Document

10.1109/A-SSCC56115.2022.9980728

Cite this

Kim, T., Lee, S., & Chae, Y. (2022). A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications. In 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings (2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/A-SSCC56115.2022.9980728

Kim, Taewoong ; Lee, Sanghoon ; Chae, Youngcheol. / A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications. 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2022. (2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings).

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abstract = "As interest in autonomous driving increases, so does the demand for LiDAR sensors. However, a significant challenge for such a sensor is to achieve both a long distance range and high resolution. The required distance range is about 250 m, and the required resolution at close distance is about 2 cm, so a dynamic range (DR) of more than 80dB is required [1, 2]. The fine resolution at close range is important for safety, but not necessary for objects that are far away. Therefore, the work in [1] uses different types of converters depending on the distance: a time-to-digital converter (TDC) is used only for short ranges (<25m) and an additional analog-to-digital converter (ADC) is used for long ranges (>25m). However, since it uses two types of converters, it has low area efficiency and high complexity, which would impose significant overhead, especially for multi-channel LiDAR sensors. This issue can be addressed in [2] by sharing the hardware (VCOs) between two converters. However, each converter requires different specifications on target ranges and it also requires additional effort to process the data from two converters.",

author = "Taewoong Kim and Sanghoon Lee and Youngcheol Chae",

note = "Funding Information: This work is supported by Samsung Electronics. efR erences: [1] K. osY hioka et al., “ A 20-ch TDC/ADC ybH rid Architecture LiDAR SoC for 240 × 96 Pielx 200 -m Range Imaging With Smart Accumulation Technique and Residue Quantiiz ng SAR ADC ,” IEEE JSSC, vol. 53, no. 11, pp. 3026-3038, Nov. 2018. Publisher Copyright: {\textcopyright} 2022 IEEE.; 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 ; Conference date: 06-11-2022 Through 09-11-2022",

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Kim, T, Lee, S & Chae, Y 2022, A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications. in 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings. 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022, Taipei, Taiwan, Province of China, 22/11/6. https://doi.org/10.1109/A-SSCC56115.2022.9980728

A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications. / Kim, Taewoong; Lee, Sanghoon; Chae, Youngcheol.

2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2022. (2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Kim T, Lee S, Chae Y. A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications. In 2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2022. (2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings). doi: 10.1109/A-SSCC56115.2022.9980728

A 103.8-dB DR 25ps-to-35ns Resolution Time-to-Digital Converter with Dynamic Ring Oscillator for LiDAR Applications

Abstract

Publication series

Conference

Bibliographical note

All Science Journal Classification (ASJC) codes

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