Electronic digital logic circuitry – Multifunctional or programmable – Array
Reexamination Certificate
2006-05-30
2006-05-30
Jeanpierre, Peguy (Department: 2819)
Electronic digital logic circuitry
Multifunctional or programmable
Array
C326S039000, C326S113000, C327S407000, C327S408000
Reexamination Certificate
active
07053654
ABSTRACT:
A structure that can be used, for example, to implement a lookup table for a programmable logic device (PLD). The structure includes configuration memory cells, pass transistors, and a buffer. The pass transistors pass the output of a selected configuration memory cell to the buffer, and are controlled by data input signals of the structure. The pass transistors have a first oxide thickness and are controlled by a value having a first operating voltage. The memory cells and buffer include transistors having a second oxide thickness thinner than the first oxide thickness, and operate at a second operating voltage lower than the first operating voltage. The data input signals are provided at the first operating voltage. Some embodiments include data generating circuits that include transistors having the first oxide thickness. Gate lengths can also vary between the memory cell transistors, pass transistors, buffer transistors, and data generating circuits.
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Kondapalli Venu M.
Voogel Martin L.
Young Steven P.
Cartier Lois D.
Jeanpierre Peguy
Nguyen Khai
Xilinx , Inc.
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