A Linear-Mode LiDAR Sensor Using a Multi-Channel CMOS Transimpedance Amplifier Array
- 주제(키워드) AGC , array , CMOS , LiDAR , PIN photodiode , pulsed-erbium fiber laser , VCF-TIA
- 주제(기타) Engineering, Electrical & Electronic; Instruments & Instrumentation; Physics, Applied
- 설명문(일반) [Hong, Chaerin; Kim, Seung-Hoon; Kim, Ji-Hoon; Park, Sung Min] Ewha Womans Univ, Dept Elect & Elect Engn, Seoul 120750, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000156955
- 본문언어 영어
- Published As http://dx.doi.org/10.1109/JSEN.2018.2852794
초록/요약
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 m CMOS process demonstrate 76.3-dB Omega transimpedance gain, 63-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.
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