A Linear-Mode LiDAR Sensor Using a Multi-Channel CMOS Transimpedance Amplifier Array

Chaerin Hong, Seung Hoon Kim, Ji Hoon Kim, Sung Min Park

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49 Scopus citations


This paper presents a linear-mode optical sensor for the feasible applications of unmanned vehicle LiDAR systems, in which a pulsed-erbium fiber laser is exploited as a light source and a 16-channel transimpedance amplifier (TIA) array is utilized in an optical Rx module with low-cost InGaAs PIN photodiodes. In particular, a voltage-mode CMOS feedforward (VCF-TIA) is newly proposed to achieve twice higher transimpedance gain with lower noise and similar bandwidth characteristics than a conventional inverter TIA, thereby enabling longer detection. Test chips of the 16-channel VCF-TIA array realized in a standard 0.18-\mu \text{m} CMOS process demonstrate 76.3-dB \Omega transimpedance gain, 6.3-pA/sqrt(Hz) average noise current spectral density, less than-33-dB crosstalk between channels, and 29.8-mW power dissipation per channel from a single 1.8-V supply. Automatic gain control is also equipped to extend input dynamic range for near-range detection. Hence, the proposed linear-mode optical sensor clearly detects the reflected optical pulses from the target of 5% reflection rate within the range of 0.5-25 m.

Original languageEnglish
Article number8403284
Pages (from-to)7032-7040
Number of pages9
JournalIEEE Sensors Journal
Issue number17
StatePublished - 1 Sep 2018

Bibliographical note

Funding Information:
Manuscript received April 27, 2018; revised June 25, 2018; accepted June 29, 2018. Date of publication July 4, 2018; date of current version August 10, 2018. This work was supported in part by the National Research Foundation of Korea (NRF) Grant through the Korea Government (MSIP) under Grant NRF-2014R1A2A2A01005686 and in part by the Dual Use Technology Program. The associate editor coordinating the review of this paper and approving it for publication was Dr. Ioannis Raptis. (Corresponding author: Sung Min Park.) The authors are with the Department of Electronic and Electrical Engineering, Ewha Womans University, Seoul 120-750, South Korea (e-mail: chaerin1219@gmail.com; smpark@ewha.ac.kr). Digital Object Identifier 10.1109/JSEN.2018.2852794

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  • AGC
  • CMOS
  • LiDAR
  • PIN photodiode
  • array
  • pulsed-erbium fiber laser


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