| 摘要 |
A semiconductor pickup device includes a pixel circuit including: a photodiode passing to a prescribed node a current of a value corresponding to intensity of light received; a log transistor operating in a log region when the prescribed node is increased in potential; and a reset transistor operative for the prescribed node's potential higher than a threshold potential to reset in response to a reset signal the prescribed node's potential to a reset potential, and operative for the prescribed node's potential lower than the threshold potential to avoid the resetting. For low illuminance the pixel circuit decreases in frame rate and lower minimum illuminance required for pickup can be provided.
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