1
Ross H Freeman: Configurable electrical circuit having configurable logic elements and configurable interconnects. Xilinx, Skjerven Morrill MacPherson Franklin & Friel, September 26, 1989: US04870302 (709 worldwide citation)

A configurable logic array comprises a plurality of configurable logic elements variably interconnected in response to control signals to perform a selected logic function. Each configurable logic element in the array is in itself capable of performing any one of a plurality of logic functions depen ...


2
William S Carter: Configurable logic element. Xilinx, Alan H MacPherson Richard Franklin Edel M Young, November 10, 1987: US04706216 (470 worldwide citation)

A configurable logic circuit achieves versatility by including a configurable combinational logic element, a configurable storage circuit, and a configurable output select logic. The input signals to the configurable combinational logic element are input signals to the configurable logic circuit and ...


3
Randy T Ong: Programmable logic device which stores more than one configuration and means for switching configurations. Xilinx, Edel M Young, Greg T Sueoka, June 20, 1995: US05426378 (424 worldwide citation)

A programmable logic device includes a configuration memory expanded to store two or more complete sets of configuration data. A switch on the output of the configuration memory controls the selection of the configuration data applied to the configurable logic block. Each configurable logic block ha ...


4
William S Carter: Special interconnect for configurable logic array. Xilinx, Alan H MacPherson, Steven F Caserza, Richard Franklin, February 10, 1987: US04642487 (398 worldwide citation)

A special interconnect circuit which connects adjacent configurable logic elements (CLEs) in a configurable logic array (CLA) without using the general interconnect structure of the CLA. In one embodiment, an array of CLEs is arranged in rows and columns and a special vertical lead circuit is provid ...


5
Stephen M Trimberger, Richard A Carberry, Robert Anders Johnson, Jennifer Wong: Time multiplexed programmable logic device. Xilinx, Jeanette S Harms, Norman R Klivans, July 8, 1997: US05646545 (341 worldwide citation)

A programmable logic device (PLD) comprises a plurality of configurable logic blocks (CLBs), an interconnect structure for interconnecting the CLBs, and a plurality of programmable logic elements for configuring the CLBs and the interconnect structure. Each CLB includes a combinational element and a ...


6
Steven P Young, Kamal Chaudhary, Trevor J Bauer: FPGA repeatable interconnect structure with hierarchical interconnect lines. XILINX, Lois D Cartier, Edel M Young, June 22, 1999: US05914616 (330 worldwide citation)

The invention provides an FPGA interconnect structure preferably included in an array of identical tiles. A combination of single-length lines connecting to adjacent tiles and intermediate-length lines connecting to tiles several tiles away creates an interconnect hierarchy which allows any logic bl ...


7
Thomas A Kean: Hierarchically connectable configurable cellular array. Xilinx, Edel M Young, November 21, 1995: US05469003 (305 worldwide citation)

An field programmable gate array (FPGA) of cells arranged in rows and columns is interconnected by a hierarchical routing structure. Switches separate the cells into blocks and into blocks of blocks with routing lines interconnecting the switches to form the hierarchy. Also, select units for allowin ...


8
Bernard J New: Logic structure and circuit for fast carry. Xilinx, Edel M Young, September 20, 1994: US05349250 (291 worldwide citation)

Programmable logic devices which include multiple blocks of combinatorial function generators and storage elements, and which are interconnected by a programmable interconnect structure are used, among other things for performing arithmetic functions which use logic for generating the carry function ...


9
William S Carter: Microprocessor oriented configurable logic element. Xilinx, Alan H MacPherson, Edel M Young, Terrence E Dooher, July 19, 1988: US04758985 (262 worldwide citation)

A microprocessor controlled configurable logic circuit achieves versatility by including a configurable combinational logic element, a configurable storage circuit, a configurable status buffer, and a configurable output select logic. The input signals to the configurable combinational logic element ...


10
Stephen M Trimberger, Richard A Carberry, Robert Anders Johnson, Jennifer Wong: Method of time multiplexing a programmable logic device. Xilinx, Jeanette S Harms, November 12, 2002: US06480954 (255 worldwide citation)

A programmable logic device (PLD) comprises at least one configurable element, and a plurality of programmable logic elements for configuring the configurable element(s). Alternatively, a PLD comprises an interconnect structure and a plurality of programmable logic elements for configuring the inter ...



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