| 摘要 |
A solid-state image pickup apparatus includes: a pixel portion in which at least one pixel with a photo-electric conversion element is arranged; an analog/digital converter comprising: a delay circuit in which delay elements are connected in multiple stages, the delay elements having a delay amount in accordance with a difference between an output voltage that is output from the pixel portion for every pixel and a predetermined reference voltage; and a decoder portion that, after detecting a number of circulations, in the delay circuit, of a pulse propagating in the delay circuit and a number of stages, of the delay elements connected in multiple stages, through which the pulse has propagated, outputs a digital signal based on the detected number of circulations and stages for each of the pixels; and a control circuit which controls the analog/digital converter so as to modify a number of bits of the digital signal that is output from the analog/digital converter, in accordance with on a preset shooting mode, in which the control circuit modifies a period where the pulse propagates in the delay circuit.
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