Patent ID: 7271641

Claim:
A self-repairable semiconductor, comprising: a first device implemented by said self-repairable semiconductor; a replacement device implemented by said self-repairable semiconductor for said first device; and a switching device implemented by said self-repairable semiconductor that selectively swaps said replacement device for said first device when said first device is non-operable, wherein said switching device includes an analog switching circuit that selects one of a first pair of differential outputs of said first device having a first common mode voltage and a second pair of differential outputs of said replacement device having a second common mode voltage, wherein said analog switching circuit comprises: first and second switches having first ends that communicate with the first pair of differential outputs; third and fourth switches having first ends that communicate with the second pair of differential outputs; an amplifier having a first input that communicates with second ends of said first and third switches and a second input that communicates with second ends of said second and fourth switches; and a common mode feedback circuit that communicates with said first and second inputs of said amplifier and that maintains a common mode voltage input of said amplifier below the first common mode voltage.