Patent ID: 7200029

Claim:
A ferroelectric storage device comprising: a ferroelectric capacitor retaining data by polarization; a bit line via which the data is inputted and outputted to the ferroelectric capacitor; a first switching element selectively connecting the ferroelectric capacitor and the bit line; a first transistor connected to the bit line and to a reference potential; a reference ferroelectric capacitor retaining fixed data; a reference bit line via which the data is inputted and outputted to the reference ferroelectric capacitor; a reference switching element selectively connecting the reference ferroelectric capacitor and the reference bit line; a second transistor connected to the reference bit line and the reference potential; a potential control circuit controlling a potential of the bit line when the bit line is connected to the ferroelectric capacitor, and controlling a potential of the reference bit line when the reference bit line is connected to the reference ferroelectric capacitor; and a timing control circuit controlling a detection timing for detecting the data of the bit line.