Static information storage and retrieval – Systems using particular element – Ferroelectric
Reexamination Certificate
2005-04-26
2005-04-26
Lebentritt, Michael S. (Department: 2824)
Static information storage and retrieval
Systems using particular element
Ferroelectric
C365S149000
Reexamination Certificate
active
06885574
ABSTRACT:
A method of sensing a ferroelectric non-volatile information storage unit comprising two ferroelectric storage capacitors in mutually opposite polarization states, and a sensing circuit for actuating the method. The method comprises the steps of: making a voltage applied across the two storage capacitors substantially zero; starting from this condition, progressively increasing the voltage applied thereacross by supplying a prescribed current, until a first one of the two storage capacitors approaches a condition of polarization state reversal, thereby the voltage applied across said first storage capacitor starts to decrease with respect to the voltage applied across the second storage capacitor; and amplifying a voltage difference between the voltages applied across the two storage capacitors by making the voltage applied across the first storage capacitor substantially zero and the voltage applied across the second storage capacitor substantially equal to a non-zero voltage corresponding to a logic state opposite to a logic state corresponding to the zero voltage.
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Demange Nicolas
Sberno Giampiero
Torrisi Salvatore
Graybeal Jackson Haley LLP
Jorgenson Lisa K.
Le Toan
Lebentritt Michael S.
Santarelli Bryan A.
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