Patent ID: 6944045

Claim:
A data holding device with a data holding circuit made to be capable of holding data by interconnecting, in a series loop, an inverter circuit disposed in a main signal path and an inverter circuit disposed in a feedback path, comprising: a first on-off gate disposed between an output node of the inverter circuit disposed in the feedback path and an input node of the inverter circuit disposed in the main signal path, the first on-off gate being on-off-controlled to be on when data is held, and to be off when data is passed; and a first ferroelectric capacitor having its one end connected to a path between the output node of the inverter circuit disposed in the feedback path and the first on-off gate; wherein a polarized state corresponding to the data held in the data holding circuit is memorized in the first ferroelectric capacitor by giving a writing signal to the other end of the first ferroelectric capacitor; and wherein the data corresponding to the polarized state memorized in the first ferroelectric capacitor is restored in the data holding circuit by giving a reading signal to the other end.