| 摘要 |
A repair circuit of a semiconductor memory device is provided to reduce the area of a semiconductor chip by reducing an address line, by sharing a decoded address outputted from an address decoder in a fuse box. An address input circuit(110) outputs an address. A row address decoder(120) decodes an address. A sub word line driver(150) repairs a defective main word line among a number of main word lines connected to a main word line driver(140) according to the output of the row address decoder. A fuse box(130) generates a repair control signal to prevent the output of the row address decoder provided to the defective main word line according to the output of the row address decoder.
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