Logical calculation circuit, logical calculation device, and logical calculation method
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United States of America Patent
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Dec 9, 2008
Grant Date -
Jun 29, 2006
app pub date -
Feb 2, 2004
filing date -
Feb 6, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A logical calculation circuit capable of storing data, and performing logical calculations with high reliability and high speeds are provided. The residual polarized state s' of a load ferroelectric capacitor Cs' is actively changed so that the residual polarized state s' of a load ferroelectric capacitor Cs' is opposite to the residual polarized state s of a storage ferroelectric capacitor Cs. In the case a reference potential is made c=0 in the calculation operation, even if the second data to be calculated x=1 is given to the storage ferroelectric capacitor Cs in the residual polarized state s (the first data to be calculated)=0, the ferroelectric capacitor Cs does not reverse in polarity. Even with combinations other than s=0 and x=1, the ferroelectric capacitor Cs does not reverse in polarity. Difference is great between a potential VA=VA(0) occurring at a coupling node when x=1 is given to the ferroelectric capacitor Cs of s=0 and a potential VA=VA(1) occurring at the coupling node when x=1 is given to the ferroelectric capacitor Cs of s=1.
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