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Open AccessArticle

A High-Multi Target Resolution Focal Plane Array-Based Laser Detection and Ranging Sensor

1
CIS Development Division, SK Hynix, Icheon 17336, Korea
2
Department of Electronics Engineering, Chungnam National University, Daejeon 34134, Korea
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(5), 1210; https://doi.org/10.3390/s19051210
Received: 11 February 2019 / Revised: 1 March 2019 / Accepted: 4 March 2019 / Published: 9 March 2019
(This article belongs to the Special Issue Sensors In Target Detection)
This paper introduces a digital-assisted multiple echo detection scheme, which utilizes the waste time of the full serial data readout period in a focal plane array (FPA)-based laser detection and ranging (LADAR) receiver. With the support of an external digital signal processor (DSP) and additional analog memory inserted into the receiver, the proposed readout scheme can effectively enhance multi-target resolution (MTR) three times higher than the conventional FPA-based LADAR, while maintaining low power consumption and a small area. A prototype chip was fabricated in a 0.18-μm CMOS process with an 8 × 8 FPA configuration, where each single receiver pixel occupied an area of 100 μm × 100 μm. The single receiver achieved an MTR of 20 ns with 7.47 mW power dissipation, an input referred noise current of 4.48 pA/√Hz with a bandwidth 530 MHz, a minimum detectable signal (MDS) of 340 nA, a maximum walk error of 2.2 ns, and a maximum non-linearity of 0.05% among the captured multiple echo images. View Full-Text
Keywords: FPA-based LADAR; ToF; multi-target resolution; multiple echo detection FPA-based LADAR; ToF; multi-target resolution; multiple echo detection
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MDPI and ACS Style

Kim, H.-J.; Lee, E.-G.; Kim, C.-Y. A High-Multi Target Resolution Focal Plane Array-Based Laser Detection and Ranging Sensor. Sensors 2019, 19, 1210.

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