Patent ID: 10074421

Abstract:
In order to provide a crossbar switch type memory circuit designed to be usable in normal circumstances even when a resistance change element is in an adverse state, the present invention is provided with: a first unit including a first column wiring to which one end of a first resistance change element is connected, a first power supply-side transistor for controlling the connection of the first column wiring and a power supply node, a first ground-side transistor, of a reverse operation type to the first power supply-side transistor, for controlling the connection of the first column wiring and a ground node, and a first polarity control line for causing the first power supply-side transistor or the first ground-side transistor to turn on and the other to turn off by a polar signal from a polar signal terminal, the first polarity control line being connected to the control terminals of the first power supply-side transistor and first ground-side transistor; a second unit including a second column wiring to which one end of a second resistance change element is connected, a second power supply-side transistor, of the same operation type as the first power supply-side transistor, for controlling the connection of the second column wiring and the power supply node, a second ground-side transistor, of a reverse operation type to the second power supply-side transistor, for controlling the connection of the second column wiring and the ground node, a logic inversion circuit for inverting the polarity of the polar signal from the polar signal terminal and outputting the polarity-inverted signal, and a second polarity control line for causing the second power supply-side transistor or the second ground-side transistor to turn on and the other to turn off by a polar signal from the logic inversion circuit, the second polarity control line being connected to the control terminals of the second power supply-side transistor and second ground-side transistor; and n row wirings (n: positive integer) to which the other ends of the first and second resistance change elements are connected.