Black and white reference and end-of-scan indicator for charge c

Details Black and white reference and end-of-scan indicator for charge c Black and white reference and end-of-scan indicator for charge c

1985-04-03

1987-06-23

Munson, Gene M.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

357 24, 357 30, 35821316, 35821323, 377 58, H03K 342, H01L 2978, H01L 2714, H01L 3100

Patent

active

046755497

ABSTRACT:
Structure is disclosed for a charge-coupled device for generating reference signals indicative of black and white optical conditions and for generating an end-of-scan indicator signal. The black reference signal is generated by electrically and optically isolating one or more photosites of the CCD. A white reference signal is generated by injecting a controlled amount of charge into one or more elements of a shift register of a charge-coupled device. The end-of-scan indicator signal is generated by injecting a signal into at least one element of a shift register which does not have photosites associated with it. The black and white reference signals allow the utilization of the full dynamic range of the device under a wide range of operation conditions, while the end-of-scan indicator eliminates the need for external counting or reset circuits associated with conventional charge-coupled devices.

REFERENCES:
patent: 3584146 (1971-06-01), Cath et al.
patent: 3806729 (1974-04-01), Caywood
patent: 3814955 (1974-06-01), Itoh et al.
patent: 4010319 (1977-03-01), Levine
patent: 4293877 (1981-10-01), Tsunekawa et al.
Sequin et al., "Charge-Coupled Area Image Sensor Using Three Levels of Polysilicon" IEEE Trans. Electron Devices vol. ED-11 (11/74), pp. 712-720.
Moasen et al., "A 16-Kbit Block Addressed Charge-Coupled Memory Device" IEEE J. Solid State Circuits vol. SC-11 (2/76), pp. 40-48.
Kim, "Two-Phase Charge Coupled Linear Imaging Devices . . . " IEEE Int. Electron Devices Meeting (12/74), Tech. Dig., pp. 55-58.
Radio-Electronics, pp. 56-58.

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