1
Ross H Freeman: Configurable electrical circuit having configurable logic elements and configurable interconnects. Xilinx, Skjerven Morrill MacPherson Franklin & Friel, September 26, 1989: US04870302 (718 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
Ross H Freeman, Hung Cheng Hsieh: Distributed memory architecture for a configurable logic array and method for using distributed memory. Xilinx, Edel M Young, Patrick T Bever, August 30, 1994: US05343406 (252 worldwide citation)

Additional circuitry for a configurable logic array having logic functions which are programmed by loading memory cells which cause the logic array to generate a desired function. With the additional circuitry, the memory cells can also be used as memory for access by other parts of the logic array ...


3
Ross H Freeman, Hung Cheng Hsieh: Circuit for selecting a bit in a look-up table. Xilinx, Jeanette S Harms, January 30, 1996: US05488316 (117 worldwide citation)

This invention provides additional circuitry for a configurable logic array having logic functions which are programmed by loading memory cells which cause the logic array to generate a desired function. With the additional circuitry, the memory cells can also be used as memory for access by other p ...


4
Ross H Freeman: Integrated circuit programmable cross-point connection technique. Zilog, Majestic Gallagher Parsons & Siebert, June 2, 1987: US04670749 (72 worldwide citation)

A technique for programming connections of conductors that is particularly adapted to be implemented as part of an integrated circuit so that a number of connections internal of the circuit can be made from outside the circuit in order to customize it after fabrication. A specific arrangement of fiv ...


5
Ross H Freeman, Hung Cheng Hsieh: Distributed memory architecture for a configurable logic array and method for using distribution memory. Xilinx, Edel M Young, July 11, 1995: US05432719 (62 worldwide citation)

This invention provides additional circuitry for a configurable logic array having logic functions which are programmed by loading memory cells which cause the logic array to generate a desired function. With the additional circuitry, the memory cells can also be used as memory for access by other p ...


6
Ross H Freeman deceased, Khue Duong, Hung Cheng Hsieh, Charles R Erickson, William S Carter: Programmable connector for programmable logic device. Xilinx, Edel M Young, Bradley A Greenwald, Alan H MacPherson, August 18, 1992: US05140193 (33 worldwide citation)

A structure especially useful in a configurable logic array includes a plurality of conductive interconnect lines located along the perimeter of a logic array chip. Lines running from exterior pins or pads can be used by a programmable interconnect circuit to control signals applied to these interco ...


7
Ross H Freeman deceased: Configurable electrical circuit having configurable logic elements and configurable interconnects. Xilinx, Edel M Young, Kenneth E Leeds, Alan H MacPherson, August 31, 1993: USRE034363

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 ...


8
Carter William S, Ross H Freeman: Programmable logic device. Xilinx, October 3, 1997: JP1997-261040

PROBLEM TO BE SOLVED: To provide a programmable logic circuit formed on an integrated circuit chip in which a desired logic function is realized easily by the user through programming. SOLUTION: This logic device is provided with plural logic elements LEs each of which has an input lead (in) and an ...


9
Carter William S, Ross H Freeman: Programmable logical device. Xilinx, October 3, 1997: JP1997-261039

PROBLEM TO BE SOLVED: To allow a user to easily program, so as to realize a desired logical function by providing a means connecting input and output leads to mutual connection lines by respective programming and a means mutually connecting the mutual connecting lines by programming. SOLUTION: Each ...


10
Ross H Freeman: Special interconnection for configuration adaptive logic array. Xilinx, October 7, 1994: JP1994-283996

PURPOSE: To provide the special interconnection circuit that interconnects selected CLEs in the CLA so as to decrease number of general interconnection components in use. CONSTITUTION: The configuration adaptive logic array has a plurality of configuration adaptive logic elements 40 interconnected v ...