Patent ID: 7773437

Claim:
A design structure embodied in a machine readable medium used in a design process, the design structure comprising: a system for implementing a memory column redundancy scheme, wherein the system comprises: a core array having a plurality of columns and a redundancy column each configured for reading or writing a bit of information; circuitry for steering around a defective column in the core array, the circuitry comprising: a plurality of redundancy decoders corresponding to each column in the core array, each of the plurality of redundancy decoders having input lines for receiving a column replace address signal and an enable column redundancy signal, the column replace address signal identifying the defective column in the core array and the enable column redundancy signal activating the memory column redundancy scheme; and a plurality of column enable generators corresponding to each column and the redundancy column in the core array and is configured to bypass the defective column and shift down every column within the core array after the defective column consequently having a non-defective column take the place of the defective column and utilizing the redundancy column to take the place of one column adjacent thereto when the plurality of column enable generators correspondingly receive a plurality of replace column signals correspondingly from the plurality of redundancy decoders and a column select signal from a column decoder, the plurality of replace column signals identifying which columns should be replaced by another column or the redundancy column and the column select signal identifying an address of one column to be accessed; and a column multiplexor having a plurality of multiplexors each configured to provide a data path correspondingly between one column in the core array and a data output line when each of the multiplexors receives a plurality of enable column signals from the plurality of column enable generators, the plurality of enable column signals is configured to enable access to one column or the redundancy column in the core array.