| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferroelectric memory free from read errors even if there are variations in ferroelectric capacitance or in reversed electric charges in the ferroelectric capacitor. SOLUTION: A reference voltage generator circuit 25 having resistors R1, R2 and R3 is formed at the post stage of pre-sense amplifiers 2, 3. Resistance values of those resistors R1, R2 and R3 are decided so that reference voltages REF, REFX outputted from the reference voltage generator circuit 25 reach values between the variation range of the potential of output terminals OUT0, OUT0X, OUT1 and OUT2 of the pre-sense amplifiers 2, 3, 12 and 13 when they have expected logical values "1", and the variation range when they have expected logical values "0". COPYRIGHT: (C)2007,JPO&INPIT
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