Electronic digital logic circuitry – Multifunctional or programmable – Array
Reexamination Certificate
2002-07-08
2003-11-18
Tran, Anh (Department: 2819)
Electronic digital logic circuitry
Multifunctional or programmable
Array
C326S039000, C326S041000, C326S049000
Reexamination Certificate
active
06650143
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates to field programmable gate arrays (FPGA), and more particularly, to a FPGA based upon the breakdown of the gate oxide of a transistor.
BACKGROUND OF THE INVENTION
FPGA's are finding increasing application as logic and/or processing elements. One type of FPGA utilizes SRAM cells, which requires six transistors. This results in a large cell size and therefore low density. Moreover, SRAM based FPGA is volatile.
Another type of FPGA is based upon anti-fuse technology. Although widely accepted, anti-fuse technology requires specialized fuse manufacturing process. Further, a FPGA based upon anti-fuse technology can only be programmed once.
Yet another type of FPGA is based upon flash memory technology. However, flash memory technology requires a relatively more complex semiconductor manufacturing process, thereby increasing cost.
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Kilopass Technologies, Inc.
Perkins Coie LLP
Tran Anh
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