| 摘要 |
It is ideal to amplify voltage within a pixel to obtain sufficient sensitivity and low noise characteristics in a short storing time in order to acquire high-speed images, but no method has existed to satisfy the three requirements of the electronic shutter operation, removal of reset noise and signal voltage amplification. To solve this problem, the present invention takes the ratio of the capacitor C 1 at point V 1 and capacitor C 2 at point V 2 to be large, and transfers charges from V 1 to V 2, thereby enabling the signal voltage to be amplified. Moreover, the reset noise component sampled and included in VFD 0 before opening TX is the same amount as the reset noise included in the voltage after TX is opened and the DeltaVFD of change occurred, so the reset noise is removed by taking out the amount of change DeltaVFD and amplifying the signal voltage. By returning R to 3V, the charge injection from the section V 1 does not occur, thereby the voltage of V 2 is held as is, and enters into storage status. Being executed in all the pixels at the same timing, these operations play the role of the electronic shutter.
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