Reduction of forward crosstalk using time division multiplexing
OwnerRicki Dee Williamsinventor
Life of this patent
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Abstract
A method and system for reducing forward crosstalk using time division multiplexing of the crosstalk noise. The method includes routing a plurality of signal lines along generally parallel paths and spacing one or more groups of the plurality of signal lines unequally in a neck in and a neck out configuration so that adjacent signal lines in each of the one or more groups of the plurality of signal lines extend away from each other within a predetermined distance. The method may also include terminating each of the plurality of signal lines using active termination. The method may also include establishing a single strip line stack up.
Claims49
A method for reducing forward crosstalk, the method comprising:
- routing a plurality of signal lines along generally parallel paths;
- and
- spacing one or more groups of the plurality of signal lines unequally in a variable spacing configuration so that adjacent signal lines in each of the one or more groups of the plurality of signal lines extend away from each other within a predetermined distance to reduce the forward crosstalk between the adjacent signal lines.
A system with reduced forward crosstalk, comprising:
- means for conveying data signals;
- means for routing ones of the means for conveying data signals along generally parallel paths;
- and
- means for spacing one or more groups of the means for conveying data signals unequally in a variable spacing configuration so that adjacent ones of the means for conveying data signals extend away from each other within a predetermined distance to reduce the forward crosstalk between the adjacent ones of the means for conveying data signals.
A computer readable medium encoded with instructions that, when executed by a computer system, performs a method for reducing forward crosstalk, the method comprising:
- routing a plurality of signal lines along generally parallel paths;
- and
- spacing one or more groups of the plurality of signal lines unequally in a variable spacing configuration so that adjacent signal lines in each of the one or more groups of the plurality of signal lines extend away from each other within a predetermined distance to reduce the forward crosstalk between the adjacent signal lines.
A system with reduced forward cross talk, the system comprising:
- a backplane;
- and
- a plurality of signal lines routed along generally parallel paths, wherein the plurality of signal lines are divided into one or more groups of signal lines, wherein within each group of the one or more groups of signal lines, the signal lines are spaced unequally in a variable spacing configuration so that adjacent signal lines extend away from each other within a predetermined distance to reduce the forward crosstalk between the adjacent signal lines.
A system with reduced forward crosstalk, the system comprising:
- a plane;
- and
- at least three communications links disposed in the plane, each of the at least three communications links generally parallel to an adjacent communications link of the at least three communications links;
- wherein each communications link of the at least three communications links is divided into a plurality of segments, with each segment of the plurality of segments and a corresponding segment of the adjacent communications link of the at least three communications links separated by a fixed distance defining a set of segments;
- and
- wherein each pair of adjacent communications links of the at least three communications links includes two or more sets of segments with each set of segments separated by a respective fixed distance with at least two respective fixed distances being different, with a greater one of the with at least two respective fixed distances reducing the forward crosstalk between said each pair of adjacent communications links of the at least three communications links.
A method for reducing forward crosstalk between a first signal line and a second signal line, the method comprising:
- spacing, for a first run length, the first signal line and the second signal line at a first separation distance, which tends to induce forward crosstalk to a first level per unit length;
- spacing, for a second run length, the first signal line and the second signal line at a second separation distance, which tends to induce forward crosstalk to a second level per unit length that is less than the first level per unit length, wherein the second run length at the second separation distance tends to reduce the forward crosstalk;
- and
- spacing, for a third run length, the first signal line and the second signal line at a third separation distance, which tends to induce forward crosstalk to a third level per unit length that is greater than the second level per unit length.
Dependencies are inferred from the claim text.