Patent ID: 6459631
Filing Date: 2002-10-01
Classification: G11C

Abstract:
A configuration for implementing redundancy for a memory chip, comprising:at least one fuse bank for storing undecoded addresses of defective lines, said fuse bank having an output for outputting the undecoded addresses; a line; a predecoder for predecoding an address; a decoder for said line, said decoder having a disable input; a redundant line; a redundancy decoder for said redundant line, said redundancy decoder having an input; a comparator having a first input receiving the address that is predecoded by said predecoder, said comparator having a second input, said comparator having an output connected to said disable input of said decoder and to said input of said redundancy decoder; and a redundancy predecoder connected to said output of fuse bank for receiving the undecoded addresses that are output by said fuse bank; said redundancy predecoder predecoding the undecoded addresses received from said fuse bank and supplying the predecoded addresses to said second input of said comparator; and said comparator comparing one of the predecoded addresses supplied from said redundancy decoder with the address that is received from said predecoder.