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  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  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.
|Title of host publication||2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|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
|Name||2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022 - Proceedings|
|Conference||2022 IEEE Asian Solid-State Circuits Conference, A-SSCC 2022|
|Country/Territory||Taiwan, Province of China|
|Period||22/11/6 → 22/11/9|
Bibliographical noteFunding Information:
This work is supported by Samsung Electronics. efR erences:  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.
© 2022 IEEE.
All Science Journal Classification (ASJC) codes
- Hardware and Architecture
- Signal Processing
- Electrical and Electronic Engineering
- Safety, Risk, Reliability and Quality
- Computer Networks and Communications