Patent ID: 6246602
Filing Date: 2001-06-12
Classification: G11C

Abstract:
A ferroelectric storage device comprising a ferroelectric storage cell which is capable of holding a polarity state to store data, the polarity state being associated with the data,whereinthe association between the data and the polarity state is changeable on a switch signal;said ferroelectric storage cell is designed to hold a first polarity state or a second polarity state the direction of which is different from that of the first polarity state, the first and second polarity states being associated with two kinds of data to be stored, and,on the switch signal, the ferroelectric storage cell changes from a present polarity state to the other polarity state and the ferroelectric storage device changes from a ""non-reversal-of-operation"" state to a ""reversal-of-operation"" state or from a ""reversal-of-operation"" state to a ""non-reversal-of-operation"" state, the ""non-reversal-of-operation"" state being a state where in write operations input data is written into the ferroelectric storage cell as it is and in read-out operations read-out data is output as it is, and, the ""reversal-of-operation"" state is a state where in write operations input data is written into the ferroelectric storage cell as it is reversed and in read-out operations read-out data is output as it is reversed.