| 摘要 |
PROBLEM TO BE SOLVED: To generate a high signal-to-noise ratio and to improve sensitivity and a dynamic range by providing an intra-pixel amplifier for amplifying signals for which influence exerted to the entire noise corresponding to it is minimum. SOLUTION: When light is abutted to a sensor Sn 202, a voltage in the output of the sensor is increased to a bias voltage VB. When a point X reaches the VB, a capacitor CS relating to the sensor 202 is saturated. After imaging, in order to read electric charges stored in the sensor Sn 202, a gate line Gn 200 is turned to a high order. At the time of assuming that the threshold voltage of a transistor An 206 is zero, when the gate line Gn 200 becomes the high order, an amplifier transistor An 206 and a path transistor Pn 208 are both switched on, and a current is allowed to flow to a data line 230. The current flowing to the data line 230 is decided by the voltage at the point X and then integrated by an external integrator 232 during the selected time.
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