A 3-dimensional Modified Vernier Time-to-digital Converter for LiDAR Sensors

This paper presents a three-dimensional (3-D) modified Vernier time-to-digital converter (MV-TDC) for the applications of light detection and ranging (LiDAR) sensors. The proposed 3-D MV-TDC combines a 2-D modified Vernier TDC and a delay-lock loop (DLL) that is preceded by an XOR and an edge-detect...

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Published inJournal of semiconductor technology and science Vol. 20; no. 6; pp. 543 - 551
Main Authors He, Ying, Joo, Ji-Eun, Park, Sung Min
Format Journal Article
LanguageEnglish
Published 대한전자공학회 01.12.2020
Subjects
전기공학
edge-detector
Vernier TDC
DLL
LiDAR sensor
Tlatch
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Summary:This paper presents a three-dimensional (3-D) modified Vernier time-to-digital converter (MV-TDC) for the applications of light detection and ranging (LiDAR) sensors. The proposed 3-D MV-TDC combines a 2-D modified Vernier TDC and a delay-lock loop (DLL) that is preceded by an XOR and an edge-detector as its input circuitry, so that the former provides 4-bit coarse digital codes while the latter generates 4-bit fine codes during the high-state of DLL that is maintained only between each rising edge of START and STOP pulses. Then, the measured detection range of a LiDAR sensor can be represented by an 8-bit digital code. The proposed 3-D MV-TDC were implemented in a 0.13-m CMOS process, demonstrating the measured dynamic range of 43.2 dB that corresponds to the detection range of 18.8 centimeters~28.6 meters. The chip dissipates 2.9 mW from a single 1.2-V supply, while its core occupies the area of 0.37 x 0.89 mm2. KCI Citation Count: 1
ISSN:1598-1657
2233-4866
DOI:10.5573/JSTS.2020.20.6.543