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A Low Power and Wide Dynamic Range Digital Pixel Sensor (DPS) for Optical Brain Imaging Systems.
- Source :
- Sensing & Imaging; 12/25/2021, Vol. 23 Issue 1, p1-17, 17p
- Publication Year :
- 2021
-
Abstract
- This paper proposes a self-reset pulse frequency modulation (PFM) digital pixel sensor (DPS) with in-pixel variable reference voltage for optical brain imaging systems. The sensor demonstrates a wide dynamic range and very low power consumption that can detect small signals of brain activity in brain. The high dynamic range, high SNR (signal-to-noise ratio), high speed and low power consumption image sensor are suitable for optical brain imaging systems. Since the comparator part consumes high power inside pixel, sub-threshold, self-biased and bulk-driven techniques are used to achieve both ultra-low-voltage and low power in the PFM DPS. Moreover, High speed (high frame rate) is achieved by image capturing in-parallel for all pixels. The proposed image sensor is post layout simulated in 0.18 µm Complementary Metal Oxide Semiconductor (CMOS) technology with 0.6 V supply voltage, resulting in the dynamic range of 152 dB and the power consumption of 11.25 nW and the fill factor of the proposed sensor is 11%. Hence, this device has significant potential to be used for brain signal detection in pre-clinical and clinical studies, cognitive process, diagnose diseases in exploring brain structure and function. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15572064
- Volume :
- 23
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Sensing & Imaging
- Publication Type :
- Academic Journal
- Accession number :
- 154341531
- Full Text :
- https://doi.org/10.1007/s11220-021-00373-z