| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a ferroelectric memory having ferroelectric capacitors wherein three-valued or more multivalued data are stored in one ferroelectric capacitor and the stored data can be read out. SOLUTION: The memory comprises memory cells 1 having ferroelectric capacitors 3, a DA means 21 which gives a write analog voltage corresponding to three or more input digital values to electrodes of the ferroelectric capacitor 3 to cause a residual polarization in the capacitor 3 when the digital values are inputted and a converting means 23 for restoring a read analog voltage to the original digital value when the read analog voltage obtained according to the residual polarization value of the capacitor 3 is inputted.</p> |
