REDUNDANT JUDGING CIRCUIT, SEMICONDUCTOR MEMORY APPARATUS AND REDUNDANT JUDGE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a redundant judging circuit which can prevent a misjudgment when a fuse is cut without causing an increase of a consumption power and a circuit area. ;SOLUTION: A switch element Tr and a fuse 14 are connected in series between a high potential power source V1 and a low potential power source V2. The switch element Tr turns on by a control signal ϕ output from a switch- driving circuit 11. A potential of a potential detect node N between the switch element Tr and fuse 14 is latched by a hold circuit 17. The fuse 14 and a load circuit 13 are connected in series between the power source to which the switch element Tr is not connected and the potential detect node N.;COPYRIGHT: (C)2000,JPO