Semiconductor memory device

A semiconductor memory device comprising a redundancy replacement judging circuit, wherein said redundancy replacement judging circuit comprises a redundancy replacement judging circuit chain responsive to a fuse judgment start signal for comparing fuse programmed information and input information to produce a redundancy replacement judgment signal, a pseudo redundancy replacement judging circuit chain for producing a pseudo redundancy replacement judgment release signal at a delay time substantially equal to that of said redundancy replacement judgment signal, and a judgment result release circuit for outputting, as a redundancy judgment signal, said redundancy replacement judgment signal in response to said pseudo redundancy replacement judgment release signal.

A redundancy replacement judging circuit comprising a redundancy replacement judging circuit chain, a pseudo redundancy replacement judging circuit chain substantially equal in delay time to said redundancy replacement judging circuit chain, and a judgment result release circuit for producing a redundancy judgment result of said redundancy replacement judging circuit chain in response to an output of said pseudo redundancy replacement judging circuit chain.

A redundancy replacement judging circuit as claimed in claim B, wherein said redundancy replacement judging circuit chain and said pseudo redundancy replacement judging circuit chain comprise equivalent circuits substantially equal in delay time to each other.

A redundancy replacement judging circuit comprising a redundancy replacement judging circuit chain responsive to a fuse judgment start signal for comparing fuse programmed information and input information to produce a redundancy replacement judgment signal, a pseudo redundancy replacement judging circuit chain for producing a pseudo redundancy replacement judgment release signal at a delay time substantially equal to that of said redundancy replacement judgment signal, and a judgment result release circuit for outputting, as a redundancy judgment signal, said redundancy replacement judgment signal in response to said pseudo redundancy replacement judgment release signal.