Patent ID: 7525368

Claim:
A fuse circuit for providing an output signal according to an initial setting signal, the state of whose voltage level is divided into a setting interval and a normal operating interval, the fuse circuit comprising: at least one fuse circuit unit comprising a voltage establishing module and a latch wherein the voltage establishing module is coupled to a first reference voltage source, the voltage establishing module comprises a fuse that is capable of being selectively blown and has a first terminal and a second terminal, the first terminal is coupled to a node, the voltage establishing module establishes a voltage level on the node according to the blown-off status of the fuse, and the latch is coupled to the voltage establishing module through the node for latching the voltage level of the node and generating the output signal; a current blocking module coupled between a second reference voltage source and the second terminal of the fuse for blocking the current flowing through the fuse during the setting interval of the initial setting signal; and a plurality of the fuse circuit units; wherein the current blocking module is coupled between the second reference voltage source and the second terminal of each fuse in the plurality of the fuse circuit units.