Patent ID: 6107820
Filing Date: 2000-08-22
Classification: H03K

Abstract:
A programmable logic device that may be repaired when a manufacturer determines that the device contains a defect, comprising:a plurality of regular programmable logic regions and at least one spare programmable logic region arranged in a row;a plurality of conductors associated with the row of logic regions;a plurality of interleaved input multiplexer circuits each of which is connected between two adjacent logic regions in the row and which distributes signals from the conductors to those two logic regions, the programmable logic device having a plurality of columns each containing one of the interleaved input multiplexer circuits and one of the logic regions; anda plurality of bypass circuits each associated with a respective column for selectively bypassing the interleaved input multiplexer circuit and logic region in that column when the manufacturer determines that there is a defect in that column, the spare programmable logic region being used when there is a defect to replace circuitry lost in the bypassed logic region.