Solid-state imaging device
AssigneeKabushiki Kaisha Toshiba
InventorKazuki HIZU
Life of this patent
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Abstract
According to one embodiment, a pixel array unit, a column ADC circuit, and a calculation circuit are provided. In the pixel array unit, pixels accumulating photoelectric converted charges are arranged in a matrix form. The column ADC circuit performs count operation based on phase relationship between a first clock and a second clock of which cycle is different from that of the first clock by looking up a comparison result between a reference voltage and a pixel signal that is read from the pixel. The calculation circuit calculates an AD conversion value of the pixel signal on the basis of a count result of the column ADC circuit.
Claims19
A solid-state imaging device comprising:
- a pixel array unit in which pixels accumulating photoelectric converted charges are arranged in a matrix form;
- a column ADC circuit configured to refer to a comparison result between a reference voltage and a pixel signal that is read from the pixel, and perform count operation on the basis of phase relationship between a first clock and a second clock of which cycle is different from that of the first clock;
- and
- a calculation circuit configured to calculate an AD conversion value of the pixel signal on the basis of a count result provided by the column ADC circuit.
Dependencies are inferred from the claim text.