Electrical pulse counters – pulse dividers – or shift registers: c – Charge transfer device – Compensating for or preventing signal charge deterioration
Patent
1981-07-14
1984-12-18
Munson, Gene M.
Electrical pulse counters, pulse dividers, or shift registers: c
Charge transfer device
Compensating for or preventing signal charge deterioration
357 24, 357 30, 377 62, 307311, G11C 1928, H01L 2978, H01L 2714, H01L 3100
Patent
active
044894236
ABSTRACT:
A charge transfer type area image sensor comprises a plurality of photosensitive picture elements arranged on a semiconductor substrate in a plurality of columns and rows. Columnar groups of shift registers including a plurality of charge transfer electrodes are disposed adjacent to the respective columnar groups of photosensitive picture elements. Storage electrodes are provided between the columnar groups of shift registers and a row-directed shift register for sending forth output signals to temporarily store signal charges generated in the photosensitive picture elements. Signal charges generated in photosensitive picture elements and then transmitted to the corresponding columnar group of shift registers in response to a first selection signal are temporarily stored under the storage electrodes and then conducted to the row-directed shift register to be sent forth therefrom as series signal charges. Excess charges transmitted to the corresponding columnar groups of shift registers in response to a second selection signal are discharged to drains through control electrodes positioned adjacent to the last charge transfer electrodes of the respective columnar groups of shift registers, thereby assuring improvement in the integration density of photosensitive picture elements and the suppression of blooming.
REFERENCES:
patent: 3931465 (1975-01-01), Levine
patent: 4117514 (1978-09-01), Terui et al.
patent: 4236168 (1980-11-01), Herbst et al.
patent: 4245164 (1981-01-01), Funahashi
Ishirara et al., "CCD Image Sensor For Single Sensor Color Camera", IEEE Int. Solid-State Circuits Conf., (2/80), Dig. Tech. Papers, pp. 24-25.
Tseng et al., "Charge Transfer and Blooming Suppression of Charge Transfer Photodiode Area Array", IEEE Journal of Solid State Circuits, vol. SC-15, No. 2, Apr. 1980, New York.
Munson Gene M.
Tokyo Shibaura Denki Kabushiki Kaisha
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