| 摘要 |
An auto fusing circuit for automatically performing fusing operations by application of one time fuse enable signal is described. The auto fusing circuit includes a primary fuse block for receiving a fuse enable signal as an enable signal, and performing a fusing operation, and a plurality of secondary fuse blocks connected to an output terminal of the primary fuse block in series for respectively receiving an out signal of the previous fuse block as an enable signal, and sequentially performing fusing operations. The primary fuse block and the secondary fuse blocks are activated by an enable of each of select signals, or deactivated by a disable of each of the select signals. According to the auto fusing circuit, the fusing operations are sequentially performed with a single application of fuse enable signal, and a test time can be reduced.
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