Imaging device and digital camera

An imaging device including an arrangement of a plurality of unit cells each for storing luminance information corresponding to an amount of received light,

• each of the plurality of unit cells comprising:
• N photodiodes, N being an integer no less than 2;
• a detection part;
• N read transistors corresponding one-to-one to the N photodiodes, and each operable to switch between conducting and non-conducting states of a path between the corresponding photodiode and the detection part, thereby causing luminance information in the corresponding photodiode to be moved to the detection part;
• a reset transistor operable to switch between conducting and non-conducting states of a path between a power supply terminal and the detection part;
• and
• an amplification transistor operable to amplify the luminance information moved to the detection part,
• wherein each of the N read transistors and the reset transistor is an enhancement transistor, and
• the imaging device further includes
• a bias circuit operable to apply a low bias voltage to a gate of the reset transistor.

A digital camera including an imaging device that includes an arrangement of a plurality of unit cells each for storing luminance information corresponding to an amount of received light,

• each of the plurality of unit cells comprising:
• N photodiodes, N being an integer no less than 2;
• a detection part;
• N read transistors corresponding one-to-one to the N photodiodes, and each operable to switch between conducting and non-conducting states of a path between the corresponding photodiode and the detection part, thereby causing luminance information in the corresponding photodiode to be moved to the detection part;
• a reset transistor operable to switch between conducting and non-conducting states of a path between a power supply terminal and the detection part;
• and
• an amplification transistor operable to amplify the luminance information moved to the detection part,
• wherein each of the N read transistors is an enhancement transistor, and the reset transistor is a depression transistor.

A digital camera including an imaging device that includes an arrangement of a plurality of unit cells each for storing luminance information corresponding to an amount of received light,

• each of the plurality of unit cells comprising:
• N photodiodes, N being an integer no less than 2;
• a detection part;
• N read transistors corresponding one-to-one to the N photodiodes, and each operable to switch between conducting and non-conducting states of a path between the corresponding photodiode and the detection part, thereby causing luminance information in the corresponding photodiode to be moved to the detection part;
• a reset transistor operable to switch between conducting and non-conducting states of a path between a power supply terminal and the detection part;
• and
• an amplification transistor operable to amplify the luminance information moved to the detection part,
• wherein each of the N read transistors and the reset transistor is an enhancement transistor, and
• the imaging device further includes
• a bias circuit operable to apply a low bias voltage to a gate of the reset transistor.