Solid-state image pickup device having lower power consumption

A solid-state image pickup device having pixels each provided with photoelectrically converting means for accumulating photo-charges depending on an amount of light received, a floating diffusion node for receiving the photo-charges accumulated by said photoelectrically converting means, transfer means for transferring the photo-charges accumulated by said photoelectrically converting means to said floating diffusion node, an amplification transistor for taking out a signal corresponding to the photo-charges from said floating diffusion node, a reset transistor for resetting said floating diffusion node, and a selection transistor connected to said amplification transistor and selectively providing an output from said amplification transistor to a signal line,

• said amplification transistor being disposed between said selection transistor and said signal line and said selection transistor being turned on after the end of reset operation by said reset transistor,
• wherein a high level of a selection pulse applied to a gate of said selection transistor is set to be higher than a source voltage to such a level that said selection transistor causes substantially no voltage lowering due to a threshold thereof.

A solid-state image pickup device having pixels each provided with photoelectrically converting means for accumulating photo-charges depending on an amount of light received, a floating diffusion node for receiving the photo-charges accumulated by said photoelectrically converting means, transfer means for transferring the photo-charges accumulated by said photoelectrically converting means to said floating diffusion node, an amplification transistor for taking out a signal corresponding to the photo-charges from said floating diffusion node, a reset transistor for resetting said floating diffusion node, and a selection transistor connected to said amplification transistor and selectively providing an output from said amplification transistor to a signal line,

• said amplification transistor being disposed between said selection transistor and said signal line, and said selection transistor being turned on after the end of reset operation by said reset transistor.
• wherein said reset transistor is constituted as a depletion transistor having a threshold set to such a low level that a voltage at said floating diffusion node is reset to substantially the source voltage when turned on.

A solid-state image pickup device having pixels each provided with photoelectrically converting means for accumulating photo-charges depending on an amount of light received, a floating diffusion node for receiving the photo-charges accumulated by said photoelectrically converting means, transfer means for transferring the photo-charges accumulated by said photoelectrically converting means to said floating diffusion node, an amplification transistor for taking out a signal corresponding to the photo-charges from said floating diffusion node, a reset transistor for resetting said floating diffusion node, and a selection transistor connected to said amplification transistor and selectively providing an output from said amplification transistor to a signal line,

• said amplification transistor being disposed between said selection transistor and said signal line, and said selection transistor being turned on after the end of reset operation by said reset transistor,
• wherein a high level of a reset pulse applied to a gate of said reset transistor is set to be higher than the source voltage to such a level that a voltage at the floating diffusion node is reset to substantially the source voltage when turned on.