FERROELECTRIC GATE DEVICE

摘要

A ferroelectric gate device includes a ferroelectric capacitor (1), a switch element (2) functioning as a resistor or a capacitor according to a voltage applied, a field effect transistor (6) having a source, drain, and a gate. The ferroelectric capacitor (1) has one end having an input terminal (IN). The other end of the ferroelectric capacitor (1) is connected to one end of the switch element (2). The other end of the switch element (2) is connected to the gate of the field effect transistor (6). When voltage is applied to the input terminal and a voltage equal to or above the coercive voltage (Vc) of the ferroelectric substance of the ferroelectric capacitor (1) is applied to the ferroelectric capacitor (1), the switch element (2) functions as a resistor. When voltage is applied to the input terminal and a voltage smaller than the coercive voltage (Vc) of the ferroelectric substance of the ferroelectric capacitor (1) is applied to the ferroelectric capacitor (1), the switch element (2) functions as a capacitor.