Authors
Francesco Mattioli Della Rocca, Hanning Mai, Sam W Hutchings, Tarek Al Abbas, Kasper Buckbee, Andreas Tsiamis, Peter Lomax, Istvan Gyongy, Neale AW Dutton, Robert K Henderson
Publication date
2020/5/20
Journal
IEEE Journal of Solid-State Circuits
Volume
55
Issue
7
Pages
1762-1775
Publisher
IEEE
Description
A 128 128 single-photon avalanche diode (SPAD) motion detection-triggered time-of-flight (ToF) sensor is implemented in STMicroelectronics 40 nm CMOS SPAD foundry process. The sensor combines vision and ToF ranging functions to acquire depth frames only when inter-frame intensity changes are detected. The 40 20 pixels integrate two 16-bit time-gated counters to acquire ToF histograms and repurpose them to compare two vision frames without the requirement for additional out-of-pixel frame memory resources. An embedded column-parallel ToF and vision processor performs on-chip vision frame comparison and binary frame output compression as well as controlling the time-resolved histogram sampling. The sensor achieves a maximum 32.5 kframes/s in vision modality and 500 frames/s in motion detection-triggered ToF over a measured 3.5 m distance with 1.5 cm accuracy. The vision …
Scholar articles
FM Della Rocca, H Mai, SW Hutchings, T Al Abbas… - IEEE Journal of Solid-State Circuits, 2020