Measuring Intra-Pixel Sensitivity Variations of a CMOS Image Sensor

CMOS Active Pixel Image Sensor

This paper addresses the development of a micropower 176 144 CMOS active pixel image sensor that dissipates one to two orders of magnitude less power than current state-of-the-art CMOS image sensors. The chip operates from a 1.5-V voltage source and the power consumption measured for the chip running from an internal 25.2-MHz clock yielding 30 frames per second is about 550 W. This amount enabl...

A 35mm 13.89 Million Pixel CMOS Active Pixel Image Sensor

This paper discusses a 13.89 million pixels CMOS image sensor for digital SLR cameras. The pitch of the 3transistor active pixel is 8 microns. The sensor has a full well charge of 117K electrons and 33 electrons temporal noise, and a dynamic range of 71 dB. The fixed pattern noise is 0.14% RMS, obtained by an on-chip correction circuit. Color filters have been optimized for best photographic pe...

CMOS image sensor with pseudorandom pixel Placement

The picture element (pixel) in conventional image sensors are placed in the form of a lattice for ease of implementation. Lattice placement of pixels intrinsically has directional singularity on the clarity of image representation, and the clarity is significantly dependent on the directions of the objects in the image. For example, horizontal lines are perfectly represented, while slanted line...

A 256 X 256 CMOS Active Pixel Image Sensor

A 256 X 256 CMOS photo-gate active pixel image sensor is presented. The image sensor uses four MOS transistors within each pixel to buffer the photo-signal, enhance sensitivity, and suppress noise. The pixel size is 20 im X 20 jm and was implemented in a standard digital 0.9 pm single-polysilicon, double-metal, n-well CMOS process; leading to 25% fill-factor. Row and column decoders and counter...

A High-Sensitivity Low Dark Current 1.75T/Pixel CMOS Image Sensor with Ring-Gate Shared-Pixel Design