| 摘要 |
PURPOSE:To restrain the time margin between the select operation and the driving operation to the required minimum to improve the operation speed, by controlling applying of driving clocks through a false select unit circuit equivalent to a select unit circuit. CONSTITUTION:The address from line address generating circuit 7 is applied to not only line select unit circuit 6 of line select circuit 5 but also false select unit circuit 18 equivalent to circuit 6; and when selection of line driving unit circuit 4 corresponding to line driving circuit 3 is completed through circuit 6, the operation of circuit 18 is completed, and this completion is detected by voltage detecting circuit 19. Clock generating circuit 18 is controlled through this circuit 19 to prevent erroneous operations such as the driving operation before completion of the select operation; and when circuit 18 is arranged farther from circuit 6 than circuit 6 to cope with the operation time dependent upon the position and circuit 18 is constituted equivalently to circuit 6 of the slowest operation dependent upon the address, the time margin between the line select operation and the line driving operation becomes a minimum. The similar operation is performed for the column, and the needless margin time does not exist, and the operation speed of the storage device is not reduced. |
