Repair circuit using antifuse

Abstract

A repair circuit substitutes a defective cell with a redundancy cell. For the purpose, the repair circuit includes an antifuse programmed by a voltage difference of both ends thereof, a programming circuit for programming the antifuse, a detection circuit for detecting whether the antifuse is programmed or unprogrammed by using a first and a second power stabilization signal of a power up reset circuit, wherein the detection is performed during a power stabilization period or after the power stabilization period, a latch circuit for latching the result of the detection to thereby generate an output signal, and a redundancy circuit having a redundancy cell for repairing the defective cell in response to the output signal of the latch circuit.

Dependencies are inferred from the claim text.