US Patent No: 5,121,360

Number of patents in Portfolio can not be more than 2000

Video random access memory serial port access

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Abstract

A Video Random Access Memory device wherein full and efficient use of a serial access memory portion provides a simple and efficient means of avoiding Mid-Line Reloads. Selected parts of two different rows in a random access memory portion are transferred simultaneously to the serial access memory portion via addressable transfer gates under the control of address/control logic.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
INTERNATIONAL BUSINESS MACHINES CORPORATIONARMONK, NY68180

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
West, Roderick M P Colchester, VT 9 141
Williams, Todd Burlington, VT 8 252

Cited Art

Patent Info (Count) # Cites Year
 
HITACHI, LTD. (1)
4,947,373 Dynamic ram 37 1987
 
KABUSHIKI KAISHA TOSHIBA (1)
4,833,657 Semiconductor frame buffer memory 27 1986
 
TEXAS INSTRUMENTS INCORPORATED (1)
4,897,818 Dual-port memory with inhibited random access during transfer cycles 24 1987

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
MICRON TECHNOLOGY, INC. (5)
5,450,355 Multi-port memory device 18 1993
5,394,172 VRAM having isolated array sections for providing write functions that will not affect other array sections 20 1993
5,490,112 Multi-port memory device with multiple sets of columns 13 1994
5,594,474 VRAM having isolated array sections for providing write functions that will not affect other array sections 4 1995
5,659,518 Multi-port memory with multiple function access cycles and transfers with simultaneous random access 9 1995
 
INTELLECTUAL VENTURES II LLC (3)
5,687,132 Multiple-bank memory architecture and systems and methods using the same 14 1995
5,844,856 Dual port memories and systems and methods using the same 21 1996
5,815,456 Multibank -- multiport memories and systems and methods using the same 24 1996
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (3)
5,544,338 Apparatus and method for raster generation from sparse area array output 10 1992
5,890,215 Electronic computer memory system having multiple width, high speed communication buffer 0 1994
5,631,672 Self-timed real-time data transfer in video-RAM 1 1995
 
KABUSHIKI KAISHA TOSHIBA (3)
5,295,254 Semiconductor memory device cell array divided into a plurality of blocks 7 1991
5,319,603 Multiport semiconductor memory device having RAM blocks and SAM blocks 18 1991
5,247,484 Multiport DRAM 7 1992
 
ANIMEDIA COMPANY LLC (2)
5,422,998 Video memory with flash fill 14 1993
5,553,229 Row addressable graphics memory with flash fill 11 1995
 
INTEL CORPORATION (2)
5,555,529 Power saving architecture for a cache memory 13 1995
6,536,038 Dynamic update of non-upgradeable memory 19 1999
 
SAMSUNG ELECTRONICS CO., LTD. (2)
5,381,376 Video RAM having block selection function during serial write transfer operation 56 1992
5,572,477 Video ram method for outputting serial data 9 1995
 
FUJITSU LIMITED (1)
5,621,866 Image processing apparatus having improved frame buffer with Z buffer and SAM port 14 1993
 
MITSUBISHI DENKI KABUSHIKI KAISHA (1)
5,379,263 Semiconductor memory device which can provide required data flexibly under simplified control and operating method therefor 42 1993
 
NEC CORPORATION (1)
5,327,391 Double buffer type elastic store comprising a pair of data memory blocks 6 1992
 
NEC ELECTRONICS CORPORATION (1)
5,331,600 Non-volatile programmable read only memory device having write-in unit sequentially writing data bits into memory cells for programming 8 1991
 
OKI SEMICONDUCTOR CO., LTD. (1)
5,377,154 Multiple serial-access memory 15 1993
 
THE PROVOST, FELLOWS AND SCHOLARS OF TRINITY COLLEGE DUBLIN (1)
5,394,536 Stable memory circuit using dual ported VRAM with shift registers in a multiple memory bank setup for high speed data-transfer 5 1993