Abstract
In this contribution, we present the concept of a 4×128 pixel line sensor for direct time-of-flight measurement based on single-photon avalanche diodes (SPAD) fabricated in a high-voltage automotive 0.35 μm CMOS process. An in-pixel time-to-digital converter with a resolution of 312.5 ps determines the arrival of photons reflected from targets in the area of view. Since we are employing a so-called first photon approach, there are no dead-time effects. In addition, our approach uses a variable photon coincidence detection to suppress effects of ambient illumination. As a test vehicle we have implemented a 1×80 pixel CMOS SPAD line sensor and characterized it.
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Schrey, O.M., Beer, M., Brockherde, W., Hosticka, B.J. (2018). SPAD-Based Flash Lidar with High Background Light Suppression. In: Zachäus, C., Müller, B., Meyer, G. (eds) Advanced Microsystems for Automotive Applications 2017. Lecture Notes in Mobility. Springer, Cham. https://doi.org/10.1007/978-3-319-66972-4_4
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DOI: https://doi.org/10.1007/978-3-319-66972-4_4
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