Patent ID: 6498526
Filing Date: 2002-12-24
Classification: G11C

Abstract:
A fuse option circuit comprising:a first fuse element having first and second terminals, the first terminal of the first fuse element connected to a first power terminal; a second fuse element having first and second terminals, the first terminal of the second fuse element connected to the first power terminal; first and second nodes connected to the second terminals of the first and second fuse elements, respectively; a current sensing circuit coupled to the first and second fuse elements and structured to sense a difference of currents in the first and second fuse elements, and to set voltages of the first and second nodes depending on the current difference thus sensed; the current sensing circuit including a first transistor coupled between the first node and a second power terminal, and including a second transistor coupled between the second node and the second power terminal; and an amplifier structured to amplify voltages of the first and second nodes to the level of voltages of the first and second power terminals or to voltages of the second and first power terminals, respectively.