| 摘要 |
PURPOSE:To obtain the solid-state image-pickup device suitable for a high-speed operation with which mixing of thermal noise can be prevented by a method wherein selective electrodes are provided on the side of output part of the charge transfer path of the conventional device, and they are connected common with each other. CONSTITUTION:Final transfer electrodes 13a-13d are provided adjoining to output sections 10-12, selective electrodes 14a-14d are provided adjoining to change transfer branching points 7 and 8, they are connected common with the electrodes 13a-13d respectively, and a common potential is set using terminals 15a-13d. When a high speed operation is performed, a two-phase transfer pulse is added to terminals 15a and 15b, the terminals 15c and 15d and brought into low electric potential, and a signal is read out by the output sections 10 and 11 by separating the branching points 7 and 8 from a transfer path 9. At this time, the wiring capacitance of the terminals 15a and 15b can be made very small, the transfer pulse for electrodes 13 and 14 can be rised sharply, and a high speed operation can also be secured. Also, the electric charge thermally generated at the transfer path 9 does not run into the transfer paths 4 and 5 as noise. When a low-speed operation is performed, a signal is read out from the output section 12 by adding a two-phase transfer pulse to the terminals 15c and 15d, thereby enabling to obtain the same effect. |
