Title
An Image Signal Accumulation Multi-Collection-Gate Image Sensor Operating at 25 Mfps with 32 × 32 Pixels and 1220 In-Pixel Frame Memory.
Abstract
The paper presents an ultra-high-speed image sensor for motion pictures of reproducible events emitting very weak light. The sensor is backside-illuminated. Each pixel is equipped with the multiple collection gates (MCG) at the center of the front side. Each collection gate is connected to an in-pixel large memory unit, which can accumulate image signals captured by repetitive imaging. The combination of the backside illumination, image signal accumulation, and slow readout from the in-pixel signal storage after an image capturing operation offers a very high sensitivity. Pipeline signal transfer from the MCG to the in-pixel memory units enables the sensor to achieve a large frame count and a very high frame rate at the same time. A test sensor was fabricated with a pixel count of 32 x 32 pixels. Each pixel is equipped with four collection gates, each connected to a memory unit with 305 elements; thus, with a total frame count of 1220 (305 x 4) frames. The test camera achieved 25 Mfps, while the sensor was designed to operate at 50 Mfps.
Year
DOI
Venue
2018
10.3390/s18093112
SENSORS
Keywords
Field
DocType
high-speed,image sensor,ISAS,image signal accumulation,MCG
Computer vision,Image sensor,Electronic engineering,Pixel,Artificial intelligence,Image signal,Engineering
Journal
Volume
Issue
Citations 
18
9.0
0
PageRank 
References 
Authors
0.34
3
10