Title :
A charge summation 1/3-inch CCD image sensor with 85 dB dynamic range
Author :
Manabe, S. ; Nishida, Y. ; Iino, Y. ; Ohtake, H. ; Abe, M. ; Shibata, H. ; Matsunaga, Y. ; Endo, Y. ; Harada, N.
Author_Institution :
Toshiba Corp., Kawasaki, Japan
Abstract :
A 160-kpixel 1/3-in CCD (charge coupled device) image sensor is described based on signal charge summation of four pixels, predicted by computer simulation to realize a wide dynamic range. The device, called a preprocessing CCD, has 85 dB dynamic range and 16- mu m/sup 2/ optical aperture area unit pixel. The pixel size of this device is effectively the same as that of a 1-in optical-format 2-Mpixel CCD image sensor. Using the configuration, the vertical and horizontal CCD register-drive frequencies are one-half and a one-quarter, respectively, those of the conventional CCD. A schematic diagram of this device is shown. The image area has 333 (H)*494 (V) pixels and measures 4.86 (H)*3.66 (V)mm/sup 2/. The pixel is 15.67 (H)*7.5 (V) mu m/sup 2/. The vertical shift register consists of a four-phase CCD driven by a 7.9-kHz clock. The horizontal shift register uses a single two-phase CCD driven by a 31.6-MHz clock.<>
Keywords :
CCD image sensors; high definition television; 0.3333 in; 160 kpixel; 3.66 mm; 31.6 MHz; 4.86 mm; 7.9 kHz; charge summation; computer simulation; dynamic range; four-phase CCD; image area; pixel size; preprocessing CCD; register-drive frequencies; Charge coupled devices; Charge-coupled image sensors; Clocks; Computer simulation; Dynamic range; Image sensors; Optical devices; Optical sensors; Pixel; Shift registers;
Conference_Titel :
Solid-State Circuits Conference, 1992. Digest of Technical Papers. 39th ISSCC, 1992 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0573-6
DOI :
10.1109/ISSCC.1992.200467
