Patent ID: 6977521
Filing Date: 2005-12-20
Classification: H03K

Abstract:
1. A crossover switch adapted for use in an interconnect structure of a field programmable gate array (FPGA), said crossover switch for switching a propagating signal between any one of a first, a second, and a third vertical lines to any one of a first, a second, and a third intersecting horizontal lines, said crossover switch located at the intersection of said three intersecting horizontal lines and said three vertical lines, said crossover switch comprising: an island node at a cross-section of the first vertical and the first horizontal lines, wherein the island node divides each of the first vertical and the first horizontal lines into a first and a second part, and wherein the island node is configured to receive a signal on one of said three vertical lines or one of said three horizontal lines and selectively route said signal to one of said three vertical lines or one of said three horizontal lines; and eight programmable switches that when programmed are configured to connect each of said three vertical lines and each of said three intersecting horizontal lines to said island node, wherein: