Solid-state imaging device and camera system

A camera system having:

• a solid state imaging device with a unit pixel having a photoelectric converter for generating a charge in accordance with an amount of incident light,
• a transfer transistor for transferring a signal of the photoelectric converter to a floating node,
• an amplifier transistor for outputting a signal of the floating node to a signal line,
• a reset transistor for resetting the floating node, at least one of a plurality of potentials supplied to a gate electrode of the reset transistor being a negative potential;
• and
• a portion able to supply three or more types of potentials to the gate electrode of the reset transistor;
• an optical system for guiding an incident light to an imaging portion of the solid state imaging device;
• and
• a signal processing circuit for processing an output signal of the solid state imaging devices,
• wherein,
• the device has a portion able to set the gate potential when bringing the reset transistor from an On state to an OFF state at a negative power source potential after passing a ground level power source potential from a positive high level power source potential.