Patent attributes
The present embodiment relates to a distance sensor that reduces a difference in amounts of current injected into each of plural charge collection regions prepared for one photosensitive region in order to avoid saturation caused by disturbance light. A current injection circuit injecting current into each charge collection region includes a voltage generation circuit generating a control voltage for adjustment of the injected current amount, and the voltage generation circuit generates the control voltage corresponding to a large amount of charge between the charge amounts of storage nodes coupled, respectively, to the charge collection regions. Meanwhile, a cascode device is disposed between a transistor configured to adjust the amount of current according to the control voltage and the storage node, and a potential of a current output end of the transistor and a potential of the storage node are separated.
