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

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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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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALTERA CORPORATIONSAN JOSE, CA3420

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahanin, Bahram Cupertino, CA 34 2602
Cliff, Richard G Los Altos, CA 173 6839
Leong, William Westfield, NJ 45 1350
McClintock, Cameron Mountain View, CA 69 2013

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ALTERA CORPORATION (13)
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4,677,318 Programmable logic storage element for programmable logic devices 238 1985
4,713,792 Programmable macrocell using eprom or eeprom transistors for architecture control in programmable logic circuits 232 1985
4,774,421 Programmable logic array device using EPROM technology 174 1986
4,871,930 Programmable logic device with array blocks connected via programmable interconnect 340 1988
4,899,067 Programmable logic devices with spare circuits for use in replacing defective circuits 236 1988
4,912,342 Programmable logic device with array blocks with programmable clocking 256 1989
5,121,006 Registered logic macrocell with product term allocation and adjacent product term stealing 242 1991
5,260,610 Programmable logic element interconnections for programmable logic array integrated circuits 402 1991
5,220,214 Registered logic macrocell with product term allocation and adjacent product term stealing 142 1992
5,260,611 Programmable logic array having local and long distance conductors 424 1992
5,350,954 Macrocell with flexible product term allocation 204 1993
5,371,422 Programmable logic device having multiplexers and demultiplexers randomly connected to global conductors for interconnections between logic elements 241 1993
 
ACTEL CORPORATION (2)
4,758,745 User programmable integrated circuit interconnect architecture and test method 447 1986
5,073,729 Segmented routing architecture 123 1990
 
XILINX, INC. (2)
4,642,487 Special interconnect for configurable logic array 405 1984
RE34363 Configurable electrical circuit having configurable logic elements and configurable interconnects 586 1991
 
ALTERA SEMICONDUCTOR CORPORATION (1)
4,617,479 Programmable logic array device using EPROM technology 325 1984
 
ATMEL CORPORATION (1)
5,218,240 Programmable logic cell and array with bus repeaters 90 1992
 
CYPRESS SEMICONDUCTOR CORPORATION (1)
5,467,029 OR array architecture for a programmable logic device 43 1993
 
LATTICE SEMICONDUCTOR CORPORATION (1)
5,255,203 Interconnect structure for programmable logic device 81 1990
 
SHIELDIP, INC. (1)
2004/0133,803 Methods and apparatus for protecting information 2 2003
 
UNIVERSITY OF WASHINGTON (1)
5,208,491 Field programmable gate array 390 1992

Patent Citation Ranking

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Forward Cite Landscape

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 27 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 15 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 74 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 69 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 37 2000
6,407,576 Interconnection and input/output resources for programmable logic integrated circuit devices 123 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 19 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 9 2002
6,480,028 Programmable logic device architectures with super-regions having logic regions and memory region 3 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 4 2004
7,123,052 Interconnection resources for programmable logic integrated circuit devices 2 2005
7,317,332 Interconnection and input/output resources for programmable logic integrated circuit devices 6 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 4 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 29 1996
5,801,546 Interconnect architecture for field programmable gate array using variable length conductors 83 1996
5,914,616 FPGA repeatable interconnect structure with hierarchical interconnect lines 357 1997
5,889,411 FPGA having logic element carry chains capable of generating wide XOR functions 188 1997
5,942,913 FPGA repeatable interconnect structure with bidirectional and unidirectional interconnect lines 64 1997
5,847,579 Programmable logic array with improved interconnect structure 66 1997
5,963,050 Configurable logic element with fast feedback paths 101 1997
5,920,202 Configurable logic element with ability to evaluate five and six input functions 82 1997
5,907,248 FPGA interconnect structure with high-speed high fanout capability 43 1998
6,051,992 Configurable logic element with ability to evaluate five and six input functions 32 1999
6,107,827 FPGA CLE with two independent carry chains 44 1999
6,204,689 Input/output interconnect circuit for FPGAs 67 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 28 2000
6,204,690 FPGA architecture with offset interconnect lines 32 2000
6,292,022 Interconnect structure for a programmable logic device 22 2001
RE40423 Multiport RAM with programmable data port configuration 2 2001
6,448,808 Interconnect structure for a programmable logic device 118 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 50 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 37 1996
 
LATTICE SEMICONDUCTOR CORPORATION (1)
6,163,168 Efficient interconnect network for use in FPGA device having variable grain architecture 121 1998
 
WOLFGANG LERCHE (1)
6,657,457 Data transfer on reconfigurable chip 61 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