Ultra High Light Shutter Rejection Ratio Snapshot Pixel Image Sensor ASIC for Pattern Recognition

The ultra high light shutter rejection ratio snapshot pixel image sensor ASIC is designed for detecting moving objects without motion artifacts. This chip can be integrated into the fast moving pattern recognition system, such as machine vision and robot control system. Read more

A Two-Dimensional Array Imager Demonstrating Active Reset Suppression of kTC-Noise

The design and performance of a two-dimensional photodiode visible imager with a means of reducing the reset noise below the kTC limit is discussed. This active reset scheme uses feedback with an opamp per column in order to increase the gain and therefore the noise reduction over that seen for ordinary “soft” or “flushed” reset. Read more

A Smart CMOS Imager with On-Chip High-Speed Windowed Centroiding Capability

Low-power, high-speed, accurate computation of centroid from a pre-defined window in the image plane is important for a number of space-based and commercial applications. These include object tracking in robotic systems [1], autonomous navigation, image compression [2], and document copyright protection [3], as well as space guidance and navigation systems [4], and deep-space optical communication systems that require accurate and stable beam pointing for high speed data transfer [5]. Read more

A High Speed, 240 Frame/s, 4 Megapixel CMOS Sensor

The paper describes a large format 4 Megapixel (2352 x 1728) sensor with on-chip parallel 10 bit ADCs. The chip size is 20 x 20 mm with 7 μm pixel pitch.The paper describes a large format 4 Megapixel (2352 x 1728) sensor with on-chip parallel 10 bit ADCs. The chip size is 20 x 20 mm with 7 μm pixel pitch. It achieves a high frame rate of 240 frames/s delivering 9.75 Gbit of data per second. The sensor also features an additional fixed pattern noise cancellation circuitry. Read more

Dynamically Reconfigurable Imager for Real-Time Staring Vision Systems

Design and characterization of a high-performance multi-acuity, multi-window dynamically reconfigurable vision (DRV) CMOS imager for real-time staring vision systems is presented. By carrying out on-focal-plane image preprocessing, the imager chip simultaneously supports low-resolution large field-of-view (FOV) scan and high-resolution narrow FOV tracking. Read more

Analysis and Enhancement of Low-Light-Level Performance of Photodiode-Type CMOS Active Pixel Imagers Operated with Sub-Threshold Reset

Noise in photodiode-type CMOS active pixel sensors (APS) is primarily due to the reset (kTC) noise at the sense node [1], since it is difficult to implement in-pixel correlated double sampling for a 2-D array. Read more

CMOS Sum & Difference Imager with On-Chip Charge-Leakage Compensation

This paper presents a new technique for implementing a low-power CMOS imager with simultaneous on-chip computation of the difference and sum of two successive frames. Existing difference imagers are susceptible to errors due to collection (by the sense element and in-pixel storage node) of photo-generated charge that diffuses from the photo-active pixel area during integration of the second frame. Read more

A Low-Light to Sunlight, 60 Frames/s, 80 kpixel CMOS APS Camera-on-a-Chip with 8b Digital Output

In the last several years, many CMOS APS photodiode image sensors have been developed for consumer and commercial use. These sensors typically rely on illumination levels on the order of 100 Lux (a well-lit room) for optimal operation at video frame rates. Read more

A High Speed, 500 Frames/s, 1024 x 1024 CMOS Active Pixel Sensor

The paper presents a high-speed (500 f/s) large-format 1K x 1K 8 bit 3.3V CMOS active pixel sensor (APS) with 1024 ADCs integrated on chip. The sensor achieves an extremely high output data rate of over 500 Mbytes per second and a low power dissipation of 350 mW at the 66 MHz master clock rate.  Read more

A Single Chip CMOS APS Digital Camera

There is an enormous demand for low power, highly integrated image sensor systems. CMOS based Active Pixel Sensor (APS) technology enables this progression. We demonstrate a very low power, highly integrated, programmable, complete digital camera-on-a-chip based on CMOS APS technology. Read more