| 摘要 |
PURPOSE:To extend a refresh operation period by supplying a charge to a capacitor through a high resistance load. CONSTITUTION:A charge is supplied to a capacitor 2 from a power supply 6 through a high resistance load 7, a loss of '1' data by a leak current is prevented and the period of refresh operation is extended. When '0' data are stored in a memory cell, a charge is supplied to the capacitor 2 from the power supply 6 through the load 7, the potential of the capacitor 2 is risen. Thus, the period of the refresh operations is made longer as much as possible. |
