Back to results
US 6,278,291 B1Granted
Programmable logic array devices with interconnect lines of various lengths
AssigneeAltera Corporation
InventorsCameron McClintock, William Leong, Richard G. Cliff, Bahram Ahanin
Life of this patent
Estimating the term…
Abstract
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.
Claims21
A device comprising:
- a plurality of logic circuits having at least one programmable element;
- a first line, coupled to at least one of the plurality of logic circuits, for transmitting information;
- a second line coupled to at least one of the plurality of logic circuits for transmitting information, wherein the second line is at least twice as long as the first line;
- a third line coupled to at least one of the plurality of logic circuits for transmitting information, wherein the third line is at least four times as long as the first line;
- and
- a fourth line coupled to at least one of the plurality of logic circuits for transmitting information, wherein the fourth line is longer than the third line.
3 more elements
A device having at least one programmable element, said device comprising:
- a plurality of logic blocks arranged in multiple dimensions;
- a first set of lines, coupled to at least one of the plurality of logic blocks, for selectively transmitting information between the logic blocks;
- a second set of lines, coupled to at least one of the plurality of logic blocks, for selectively transmitting information between the logic blocks, wherein the second set of lines is at least twice as long as the first set of lines;
- a third set of lines, coupled to at least one of the plurality of logic blocks, for selectively transmitting information between the logic blocks, wherein the third set of lines is at least four times as long as the first set of lines;
- and
- a fourth set of lines, coupled to at least one of the plurality of logic blocks, for selectively transmitting information between logic blocks, wherein the fourth set of lines is longer than the third set of lines.
3 more elements
Dependencies are inferred from the claim text.