Improved sensing of ferroelectric memory cells is disclosed. When a memory
access is initiated, the bitlines are precharged to a negative voltage, for example,
-0.5 to -1.0V. This increases the effective plateline pulse (VPLH) to
VPLH+the magnitude of the negative voltage. This results in an increase
in the difference between VHI and VL0 read signals, thereby
increasing the sensing window.