US Patent No: 5,883,850

Number of patents in Portfolio can not be more than 2000

Programmable logic array integrated circuits

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Abstract

A programmable logic array integrated circuit has a number of programmable logic modules which are grouped together in a plurality of logic array blocks ("LABs"). The LABs are arranged on the circuit in a two dimensional array. A conductor network is provided for interconnecting any logic module with any other logic module. In addition, adjacent or nearby logic modules are connectable to one another for such special purposes as providing a carry chain between logic modules and/or for connecting two or more modules together to provide more complex logic functions without having to make use of the general interconnection network. Another network of so-called fast or universal conductors is provided for distributing widely used logic signals such as clock and clear signals throughout the circuit. Multiplexers can be used in various ways to reduce the number of programmable interconnections required between signal conductors.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
ALTERA CORPORATIONSAN JOSE, CA2943

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ahanin, Bahram Cupertino, CA 32 2425
Cliff, Richard G Los Altos, CA 155 6087
Cope, L Todd San Jose, CA 36 1746
Huang, Joseph San Jose, CA 201 2690
Lee, Fung Fung Milpitas, CA 22 608
Leong, William Westfield, NJ 41 1226
McClintock, Cameron R Mountain View, CA 21 822
Watson, James A Santa Clara, CA 32 1036

Cited Art

Patent Info (Count) # Cites Year
 
XILINX, INC. (6)
4,642,487 Special interconnect for configurable logic array 396 1984
4,706,216 Configurable logic element 471 1985
4,758,985 Microprocessor oriented configurable logic element 251 1986
4,855,619 Buffered routing element for a user programmable logic device 51 1987
4,847,612 Programmable logic device 121 1988
4,870,302 Configurable electrical circuit having configurable logic elements and configurable interconnects 678 1988
 
ALTERA CORPORATION (3)
5,260,610 Programmable logic element interconnections for programmable logic array integrated circuits 389 1991
5,258,668 Programmable logic array integrated circuits with cascade connections between logic modules 226 1992
5,550,782 Programmable logic array integrated circuits 268 1994
 
SGS-THOMSON MICROELECTRONICS, INC. (3)
4,912,345 Programmable summing functions for programmable logic devices 87 1988
5,027,011 Input row drivers for programmable logic devices 62 1989
5,128,559 Logic block for programmable logic devices 168 1991
 
ACTEL CORPORATION (2)
4,758,745 User programmable integrated circuit interconnect architecture and test method 440 1986
4,873,459 Programmable interconnect architecture 343 1988
 
CYPRESS SEMICONDUCTOR CORPORATION (2)
4,879,481 Dual I/O macrocell for high speed synchronous state machine 54 1988
5,023,484 Architecture of high speed synchronous state machine 62 1989
 
KAWASAKI MICROELECTRONICS, INC. (2)
5,003,200 Programmable logic device having programmable wiring for connecting adjacent programmable logic elements through a single switch station 51 1989
4,963,770 Programmable logic device 92 1990
 
LATTICE SEMICONDUCTOR CORPORATION (2)
4,963,768 Flexible, programmable cell array interconnected by a programmable switch matrix 89 1988
5,311,080 Field programmable gate array with direct input/output connection 38 1993
 
ATMEL CORPORATION (1)
5,144,166 Programmable logic cell and array 322 1990
 
FUJITSU LIMITED (1)
4,970,410 Semiconductor integrated circuit device having improved input/output interface circuit 18 1989
 
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. (1)
2002/0186,837 Multiple prime number generation using a parallel prime number search algorithm 2001
 
MASSACHUSETTS INSTITUTE OF TECHNOLOGY (1)
4,937,475 Laser programmable integrated circuit 63 1988
 
NATIONAL SEMICONDUCTOR CORPORATION (1)
5,329,180 Flexible high impedance control in a cole cell in a configurable logic array 20 1993
 
NEC ELECTRONICS CORPORATION (1)
4,831,591 Semiconductor memory capable of executing logical operation 40 1986
 
QUICKLOGIC CORPORATION (1)
5,122,685 Programmable application specific integrated circuit and logic cell therefor 264 1991
 
SIEMENS NIXDORF INFORMATIONSSYSTEME AG (1)
4,689,654 Logic array chip 34 1986
 
SILICON COMMUNICATIONS CORPORATION (1)
4,745,579 Electrically erasable programmable logic array (EEPLA) 31 1986
 
TEXAS INSTRUMENTS INCORPORATED (1)
5,089,993 Memory module arranged for data and parity bits 72 1989
 
TOKYO SHIBAURA DENKI KABUSHIKI KAISHA (1)
4,398,267 Semiconductor memory device 11 1980
 
ZORAN CORPORATION (1)
4,786,904 Electronically programmable gate array having programmable interconnect lines 166 1986

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
ACTEL CORPORATION (37)
6,150,837 Enhanced field programmable gate array 146 1997
6,049,487 Embedded static random access memory for field programmable gate array 63 1998
6,038,627 SRAM bus architecture and interconnect to an FPGA 77 1998
7,389,487 Dedicated interface architecture for a hybrid integrated circuit 7 1998
6,549,035 High density antifuse based partitioned FPGA architecture 1 1998
6,774,667 Method and apparatus for a flexible chargepump scheme for field-programmable gate arrays 3 2002
6,891,394 Field-programmable gate array low voltage differential signaling driver utilizing two complimentary output buffers 10 2002
6,765,427 Method and apparatus for bootstrapping a programmable antifuse circuit 5 2002
7,434,080 Apparatus for interfacing and testing a phase locked loop in a field programmable gate array 2 2002
6,750,674 Carry chain for use between logic modules in a field programmable gate array 8 2002
6,885,218 Parallel programmable antifuse field programmable gate array device (FPGA) and a method for programming and testing an antifuse FPGA 1 2002
6,727,726 Field programmable gate array architecture including a buffer module and a method of distributing buffer modules in a field programmable gate array 17 2002
6,946,871 Multi-level routing architecture in a field programmable gate array having transmitters and receivers 3 2002
6,891,396 Repeatable block producing a non-uniform routing architecture in a field programmable gate array having segmented tracks 4 2002
6,772,387 Cyclic redundancy checking of a field programmable gate array having an SRAM memory architecture 5 2003
6,799,240 SRAM bus architecture and interconnect to an FPGA 4 2003
6,838,902 Synchronous first-in/first-out block memory for a field programmable gate array 119 2003
6,825,690 Clock tree network in a field programmable gate array 6 2003
6,867,615 Dedicated input/output first in/first out module for a field programmable gate array 13 2003
7,054,967 SRAM bus architecture and interconnect to an FPGA 2 2004
7,111,272 Parallel programmable antifuse field programmable gate array device (FPGA) and a method for programming and testing an antifuse FPGA 2 2004
7,124,347 Cyclic redundancy checking of a field programmable gate array having an SRAM memory architecture 4 2004
7,049,846 Clock tree network in a field programmable gate array 4 2004
6,980,028 Dedicated input/output first in/first out module for a field programmable gate array 5 2005
7,126,374 Multi-level routing architecture in a field programmable gate array having transmitters and receivers 1 2005
7,075,334 Repeatable block producing a non-uniform routing architecture in a field programmable gate array having segmented tracks 2 2005
7,119,573 Field-programmable gate array low voltage differential signaling driver utilizing two complimentary output buffers 5 2005
7,102,385 Dedicated input/output first in/first out module for a field programmable gate array 7 2005
7,227,380 Synchronous first-in/first-out block memory for a field programmable gate array 5 2005
7,378,867 Field-programmable gate array low voltage differential signaling driver utilizing two complimentary output buffers 1 2006
7,385,419 Dedicated input/output first in/first out module for a field programmable gate array 2 2007
7,394,289 Synchronous first-in/first-out block memory for a field programmable gate array 2 2007
7,549,138 Parallel programmable antifuse field programmable gate array device (FPGA) and a method for programming and testing an antifuse FPGA 0 2007
7,545,168 Clock tree network in a field programmable gate array 0 2008
7,545,166 Field-programmable gate array low voltage differential signaling driver utilizing two complimentary output buffers 1 2008
7,579,869 Repeatable block producing a non-uniform routing architecture in a field programmable gate array having segmented tracks 0 2008
7,774,665 Apparatus for testing a phrase-locked loop in a boundary scan enabled device 0 2008
 
ALTERA CORPORATION (10)
6,407,576 Interconnection and input/output resources for programmable logic integrated circuit devices 89 2000
6,347,061 Programmable logic array device with random access memory configurable as product terms 3 2000
6,556,500 Programmable logic array device with random access memory configurable as product terms 3 2001
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
6,989,689 Interconnection and input/output resources for programmable logic integrated circuit devices 3 2004
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. (3)
7,107,560 Method and apparatus for designing custom programmable logic devices 3 2003
7,478,359 Formation of columnar application specific circuitry using a columnar programmable logic device 1 2006
7,965,102 Formation of columnar application specific circuitry using a columnar programmable device 0 2008
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
7,600,071 Circuit having relaxed setup time via reciprocal clock and data gating 0 2006
 
OTHER [CHECK PATENT PROFILE FOR ASSIGNMENT INFORMATION] (1)
6,614,261 Interconnection and input/output resources for programable logic integrated circuit devices 8 2002