WORKSHOP PAPER
Noise Performance of a Photovoltaic Receptor for Dynamic Vision Sensors
Abstract
The Photovoltaic Dynamic Vision Sensor (PVDVS), featuring a single photovoltaic receptor, enables reduced pixel pitch, wide dynamic range, and low power consumption. This paper investigates its noise performance under varying illuminance and temperature conditions, demonstrating that PVDVS reaches the fundamental limit set by diode shot noise without introducing a power-consumption trade-off. However, removing the feedback loop results in bandwidth limitations. To mitigate Background Activity (BA) noise, we propose a biasing-based noise filtering strategy, validated through theoretical modeling and electrical measurements. Our findings highlight PVDVS's potential for low-noise, high-efficiency vision sensing applications.Keywords
Photovoltaic Dynamic Vision Sensor, Noise Performance, Diode Shot Noise, Bandwidth Limitations, Background Activity Noise, Noise Filtering Strategy,References
[1]) P. Lichtsteiner et al., "A 128 × 128 120dB 15µs latency asynchronous temporal contrast vision sensor", IEEE Journal of Solid-State Circuits, 2008. https://doi.org/10.1109/jssc.2007.914337
[2]) Y. Hu et al., "V2e: From video frames to realistic DVS events", 2021 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW), 2021. https://doi.org/10.1109/cvprw53098.2021.00144
[3]) S. Guo et al., "Low cost and latency event camera background activity denoising", IEEE Transactions on Pattern Analysis and Machine Intelligence, 2023. https://doi.org/10.1109/tpami.2022.3152999
[4]) R. Graca et al., "Unraveling the paradox of intensity-dependent DVS pixel noise", arXiv, 2021
[5]) Y. Nozaki et al., "Temperature and parasitic photocurrent effects in dynamic vision sensors", IEEE Transactions on Electron Devices, 2017. https://doi.org/10.1109/ted.2017.2717848
[6]) P. Fernández-Peramo et al., "A Photovoltaic Dynamic Vision Sensor", IEEE Journal of Solid-State Circuits, 2025. https://doi.org/10.1109/jssc.2024.3524244
[7]) P. Fernández-Peramo et al., "Analytical Modeling of the Dependence of the Open-Circuit Voltage With Temperature in CMOS Photodiodes", IEEE Transactions on Electron Devices, 2024. https://doi.org/10.1109/ted.2024.3350549
[8]) D. S. Galbraith, "Signal and noise characteristics of photovoltaic P-N junction diodes", Ph.D. dissertation, University of British Columbia, 1957
[9]) R. Graca et al., "Optimal biasing and physical limits of DVS event noise", arXiv, 2023