Patent ID: 8254157

Claim:
A semiconductor integrated circuit comprising: an oxide resistance change element; a constant current source circuit configured to supply a write current to said oxide resistance change element; and a voltage clamper configured to clamp a voltage in a path in which said write current flows, wherein said voltage clamper is arranged in parallel with said path disposed between said constant current source circuit and said oxide resistance change element, wherein a state of said oxide resistance change element includes: a first state in which a resistance value is a first resistance value, and a second state in which a resistance value is a second resistance value larger than said first resistance value, wherein said constant current source circuit supplies a first write current to said oxide resistance change element when said oxide resistance change element is brought into transition from said first state to said second state, wherein said constant current source circuit supplies a second write current to said oxide resistance change element when said oxide resistance change element is brought into transition from said second state to said first state, and wherein said voltage clamper clamps said voltage in said path when said oxide resistance change element is brought into transition from said first state to said second state.