PURPOSE: To obtain an image signal with low power consumption, high sensitivity, and high quality.
CONSTITUTION: A signal charge photoelectrically converted by a complete depletion photodiode PD is transmitted to a capacitor C1 which converts it into a voltage signal, and plural picture element cells including a source follower amplifier element Q1 which takes out the holding voltage of the capacitor, a switching element Q2 for readout selection, and switching elements Q3, Q4 for reset which supply a reset voltage to the photodiode are arranged in at least one line shape, and an output capacitor C2 whose electrode on one side is connected to an output line via a switch for selection is provided, and a picture element signal in accordance with a photoelectric conversion signal is outputted via the switching element for readout selection after the output capacitor is reset at a first timing, and following that, a reset voltage is supplied to the photodiode PD via the switching element for reset at a second timing, then, the picture element signal setting reset potential as reference can be obtained via the output capacitor C2.
TAKEMOTO KAYAO
NAKAMURA SHIGEO
OGURA AKIRA
HITACHI DEVICE ENG