Title :
A CCD/CMOS image motion sensor
Author :
Gottardi, M. ; Yang, W.
Author_Institution :
Istituto per la Ricerca Scientifica e Technologica, Trent, Italy
Abstract :
Presents a 1D image motion sensor with a 115-pixel linear image sensor and analog CCD/CMOS processors that correlates two image frames that are spatially shifted between -5 and +5 pixels, to estimate object motion over a range of +or-1 to +or-5000 pixels/s. The CCD/CMOS smart sensor chip is fabricated with a standard double poly, double metal, 2- mu m CMOS/CCD process available through MOSIS. A block diagram of the image motion sensor is shown. It consists of 115 photodiodes (200 mu m*52 mu m). Each photodiode is connected to two CMOS sample-and-hold circuits for analog storage of two image frames. The core of the image correlator is a CCD (charge coupled device) absolute value circuit and is shown. For proper operation of the image sensor under various lighting conditions, there are additional CCD processors to provide feedback to control the integration time of the image sensor. There are several strategies for operating the motion sensor depending on the range of object motion and lighting conditions.<>
Keywords :
CCD image sensors; CMOS integrated circuits; analogue processing circuits; sample and hold circuits; 115-pixel linear image sensor; 2 micron; CCD/CMOS image motion sensor; MOSIS; absolute value circuit; analog CCD/CMOS processors; analog storage; double-poly double-metal process; image correlator; image frames; integration time; lighting conditions; object motion; photodiodes; sample-and-hold circuits; CMOS image sensors; CMOS process; Charge coupled devices; Charge-coupled image sensors; Circuits; Image sensors; Image storage; Intelligent sensors; Photodiodes; Pixel;
Conference_Titel :
Solid-State Circuits Conference, 1993. Digest of Technical Papers. 40th ISSCC., 1993 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0987-1
DOI :
10.1109/ISSCC.1993.280051
