Amplification type solid-state image pickup device
AssigneeSharp Kabushiki Kaisha
InventorTakashi Watanabe
Life of this patent
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Abstract
The amplifying solid-state image pickup device comprises a pixel section 10 and a control section 20. The control section 20 stores signal charges into the photodiode 1, and then writes the reset signal, by which the input of the inverting amplifier has been reset, into the first capacitance element 7 and the second capacitance element 9. The control section 20 writes the signal stored in the photodiode 1 into only the first capacitance element 7, and then outputs the signal, which has been stored in the photodiode 1 and written in the first capacitance element 7, to the signal line 11, and outputs the reset signal, which has been written in the second capacitance element 9, to the signal line 11.
Claims7
An amplifying solid-state image pickup device comprising:
- at least one pixel having a photoelectric conversion element and a transfer transistor for transferring signal charges from the photoelectric conversion element;
- a switched capacitor-amplifier section in which a first path having a first switching element and a first capacitance element connected in series with each other, an inverting amplifier, and a reset use switching element are connected in parallel;
- and
- a control section which turns off the transfer transistor to store signal charges into the photoelectric conversion element, and then performs a first reset operation of resetting an input of the inverting amplifier by the reset-use switching element, and then turns on the transfer transistor in a predetermined period of time with the first switching element turned on and the reset use switching element turned off to write signal charges stored in the photoelectric conversion element into the first capacitance element, and then turns on the first switching element to output the signal charges which have been written in the first capacitance element from the switched capacitor-amplifier section.
Dependencies are inferred from the claim text.