Patent ID: 7924599

Claim:
A method for writing a data state into a non-volatile memory cell, comprising the steps of: setting first and second bit lines to different signal states; selecting said memory cell by driving a common word line and activating respective first and second access transistors connected to the common word line, said activated first access transistor connecting a respective first ferroelectric capacitor between a drive line and said first bit line, and said activated second access transistor connecting a second ferroelectric capacitor between said drive line and said second bit line; and applying a drive signal to said drive line, said drive signal having first and second states, wherein a voltage difference across said first ferroelectric capacitor connected between said drive line and said first bit line when said drive line is at said first state sets a first polarization state in said first ferroelectric capacitor, and wherein a voltage difference across said second ferroelectric capacitor connected between said drive line and said second bit line when said drive line is at said second state sets a second polarization state in said second ferroelectric capacitor, whereby said first and second polarization states set respectively in said first and second ferroelectric capacitors represent a data state which is thereby stored in said memory cell.