US Patent No: 5,543,732

Number of patents in Portfolio can not be more than 2000

Programmable logic array devices with interconnect lines of various lengths

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Abstract

A programmable logic array device has a plurality of logic regions and conductors for conveying signals between the logic regions. Conductors of several different lengths are provided so that most connections between logic regions can be made using conductors which are close to the length required and not wastefully much longer than that length.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALTERA CORPORATIONSAN JOSE, CA2967

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahanin, Bahram Cupertino, CA 32 2448
Cliff, Richard G Los Altos, CA 156 6156
Leong, William Westfield, NJ 41 1242
McClintock, Cameron Mountain View, CA 61 1828

Cited Art

Patent Info (Count) # Cites Year
 
ALTERA CORPORATION (13)
4,609,986 Programmable logic array device using EPROM technology 324 1984
4,677,318 Programmable logic storage element for programmable logic devices 232 1985
4,713,792 Programmable macrocell using eprom or eeprom transistors for architecture control in programmable logic circuits 220 1985
4,774,421 Programmable logic array device using EPROM technology 168 1986
4,871,930 Programmable logic device with array blocks connected via programmable interconnect 304 1988
4,899,067 Programmable logic devices with spare circuits for use in replacing defective circuits 231 1988
4,912,342 Programmable logic device with array blocks with programmable clocking 250 1989
5,121,006 Registered logic macrocell with product term allocation and adjacent product term stealing 235 1991
5,260,610 Programmable logic element interconnections for programmable logic array integrated circuits 391 1991
5,220,214 Registered logic macrocell with product term allocation and adjacent product term stealing 137 1992
5,260,611 Programmable logic array having local and long distance conductors 412 1992
5,350,954 Macrocell with flexible product term allocation 199 1993
5,371,422 Programmable logic device having multiplexers and demultiplexers randomly connected to global conductors for interconnections between logic elements 208 1993
 
Actel Corporation (2)
4,758,745 User programmable integrated circuit interconnect architecture and test method 441 1986
5,073,729 Segmented routing architecture 123 1990
 
XILINX, INC. (2)
4,642,487 Special interconnect for configurable logic array 396 1984
RE34363 Configurable electrical circuit having configurable logic elements and configurable interconnects 546 1991
 
ALTERA SEMICONDUCTOR CORPORATION (1)
4,617,479 Programmable logic array device using EPROM technology 317 1984
 
ATMEL CORPORATION (1)
5,218,240 Programmable logic cell and array with bus repeaters 83 1992
 
CYPRESS SEMICONDUCTOR CORPORATION (1)
5,467,029 OR array architecture for a programmable logic device 43 1993
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
2002/0186,837 Multiple prime number generation using a parallel prime number search algorithm 2001
 
LATTICE SEMICONDUCTOR CORPORATION (1)
5,255,203 Interconnect structure for programmable logic device 80 1990
 
UNIVERSITY OF WASHINGTON (1)
5,208,491 Field programmable gate array 348 1992

Patent Citation Ranking

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Forward Cites

Patent Info (Count) # Cites Year
 
ALTERA CORPORATION (33)
5,670,895 Routing connections for programmable logic array integrated circuits 29 1995
5,872,463 Routing in programmable logic devices using shared distributed programmable logic connectors 20 1996
5,705,939 Programmable logic array integrated circuits with segmented, selectively connectable, long interconnection conductors 26 1996
5,844,854 Programmable logic device with two dimensional memory addressing 50 1996
5,963,049 Programmable logic array integrated circuit architectures 20 1997
5,900,743 Programmable logic array devices with interconnect lines of various lengths 14 1997
RE38651 Variable depth and width memory device 3 1998
6,288,970 Programmable logic device memory array circuit having combinable single-port memory arrays 17 1998
6,052,327 Dual-port programmable logic device variable depth and width memory array 47 1998
6,127,846 Programmable logic array devices with interconnect lines of various lengths 2 1998
6,259,272 Programmable logic array integrated circuit architectures 5 1999
6,191,998 Programmable logic device memory array circuit having combinable single-port memory arrays 58 1999
6,396,304 Programmable logic array integrated circuits with blocks of logic regions grouped into super-blocks 2 1999
6,480,027 Driver circuitry for programmable logic devices 29 2000
6,407,576 Interconnection and input/output resources for programmable logic integrated circuit devices 91 2000
6,366,120 Interconnection resources for programmable logic integrated circuit devices 5 2000
6,278,291 Programmable logic array devices with interconnect lines of various lengths 14 2000
6,392,954 Dual port programmable logic device variable depth and width memory array 2 2000
6,366,121 Programmable logic array integrated circuit architectures 0 2001
6,525,564 Interconnection resources for programmable logic integrated circuit devices 0 2001
6,690,195 Driver circuitry for programmable logic devices 8 2002
6,480,028 Programmable logic device architectures with super-regions having logic regions and memory region 2 2002
6,879,183 Programmable logic device architectures with super-regions having logic regions and a memory region 1 2002
6,727,727 Interconnection resources for programmable logic integrated circuit devices 7 2002
7,111,110 Versatile RAM for programmable logic device 10 2002
6,894,533 Interconnection and input/output resources for programmable logic integrated circuit devices 2 2003
6,897,680 Interconnection resources for programmable logic integrated circuit devices 3 2004
6,989,689 Interconnection and input/output resources for programmable logic integrated circuit devices 3 2004
7,123,052 Interconnection resources for programmable logic integrated circuit devices 1 2005
7,317,332 Interconnection and input/output resources for programmable logic integrated circuit devices 5 2005
7,480,763 Versatile RAM for a programmable logic device 0 2006
7,492,188 Interconnection and input/output resources for programmable logic integrated circuit devices 3 2007
7,839,167 Interconnection and input/output resources for programmable logic integrated circuit devices 1 2009
 
XILINX, INC. (18)
5,760,604 Interconnect architecture for field programmable gate array 28 1996
5,801,546 Interconnect architecture for field programmable gate array using variable length conductors 54 1996
5,914,616 FPGA repeatable interconnect structure with hierarchical interconnect lines 342 1997
5,889,411 FPGA having logic element carry chains capable of generating wide XOR functions 180 1997
5,942,913 FPGA repeatable interconnect structure with bidirectional and unidirectional interconnect lines 61 1997
5,847,579 Programmable logic array with improved interconnect structure 38 1997
5,963,050 Configurable logic element with fast feedback paths 73 1997
5,920,202 Configurable logic element with ability to evaluate five and six input functions 81 1997
5,907,248 FPGA interconnect structure with high-speed high fanout capability 39 1998
6,051,992 Configurable logic element with ability to evaluate five and six input functions 31 1999
6,107,827 FPGA CLE with two independent carry chains 43 1999
6,204,689 Input/output interconnect circuit for FPGAs 62 1999
6,201,410 Wide logic gate implemented in an FPGA configurable logic element 15 1999
6,124,731 Configurable logic element with ability to evaluate wide logic functions 27 2000
6,204,690 FPGA architecture with offset interconnect lines 31 2000
6,292,022 Interconnect structure for a programmable logic device 21 2001
RE40423 Multiport RAM with programmable data port configuration 1 2001
6,448,808 Interconnect structure for a programmable logic device 104 2001
 
ALTERA CANADA CO. (2)
6,590,419 Heterogeneous interconnection architecture for programmable logic devices 12 1999
6,828,824 Heterogeneous interconnection architecture for programmable logic devices 41 2003
 
OTRSOTECH, LLC (2)
7,055,125 Depopulated programmable logic array 4 2001
6,804,812 Depopulated programmable logic array 1 2003
 
Actel Corporation (1)
6,160,420 Programmable interconnect architecture 35 1996
 
LATTICE SEMICONDUCTOR CORPORATION (1)
6,163,168 Efficient interconnect network for use in FPGA device having variable grain architecture 112 1998
 
WOLFGANG LERCHE (1)
6,657,457 Data transfer on reconfigurable chip 51 2000
 
Other [Check patent profile for assignment information] (1)
6,614,261 Interconnection and input/output resources for programable logic integrated circuit devices 8 2002