Back to results
US 9,069,910 B2Granted
Mechanism for facilitating dynamic cancellation of signal crosstalk in differential input/output channels
AssigneeIntel Corporation
InventorsZhichao Zhang, Khine N. Han, Kemal Aygun
Life of this patent
Estimating the term…
Abstract
A mechanism is described for facilitating dynamic cancellation of signal crosstalk in input/output differential channels according to one embodiment. A method of embodiments may include detecting crosstalk between a first differential signal channel pair (“differential pair”) and a second differential pair of a plurality of differential pairs at a computing system, and switching polarity relating to the first transmission links of the first differential pair to cancel out the crosstalk with the second differential pair.
Claims18
An apparatus comprising:
- a plurality of differential signal channel pairs (“differential pairs”) of a computing system, wherein a first differential pair and a second differential pair of the plurality of differential pairs experience crosstalk;
- and
- logic to manipulate polarity relating to at least one of first transmission links of the first differential pair and second transmission links of the second differential pair such that the polarity is switched to cancel out the crosstalk between the first differential pair and the second differential pair, wherein switching includes re-routing one or more of the first and second transmission links based on designs of the first and second differential pairs, wherein re-routing is performed via a parallel pattern re-routing scheme such that a first far-end crosstalk polarity of a vertical connection is determined by at least one of locations of the first and second differential pairs and pin polarity assignments of the first and second differential pairs, and a second far-end crosstalk polarity of a horizontal routing is determined by at least one of design rules and line polarity rules associated with the first and second differential pairs.
A system comprising:
- a computing system including a printed circuit board (PCB) having a plurality of differential signal channel pairs (“differential pairs”) having a first differential pair and a second differential pair, wherein the first differential pair and the second differential pair of the plurality of differential pairs experience crosstalk, and
- wherein polarity relating to at least one of first transmission links of the first differential pair and second transmission links of the second differential pair such that the polarity is switched to cancel out the crosstalk between the first differential pair and the second differential pair, wherein switching includes re-routing one or more of the first and second transmission links based on designs of the first and second differential pairs, wherein re-routing is performed via a parallel pattern re-routing scheme such that a first far-end crosstalk polarity of a vertical connection is determined by at least one of locations of the first and second differential pairs and pin polarity assignments of the first and second differential pairs, and a second far-end crosstalk polarity of a horizontal routing is determined by at least one of design rules and line polarity rules associated with the first and second differential pairs.
A method comprising:
- detecting crosstalk between a first differential signal channel pair (“differential pair”) and a second differential pair of a plurality of differential pairs at a computing system;
- and
- manipulate polarity relating to at least one of the first transmission links of the first differential pair and second transmission links of the second differential pair such that the polarity is switched to cancel out the crosstalk between the first differential pair and the second differential pair, wherein switching includes re-routing one or more of the first and second transmission links based on designs of the first and second differential pairs, wherein re-routing is performed via a parallel pattern re-routing scheme such that a first far-end crosstalk polarity of a vertical connection is determined by at least one of locations of the first and second differential pairs and pin polarity assignments of the first and second differential pairs, and a second far-end crosstalk polarity of a horizontal routing is determined by at least one of design rules and line polarity rules associated with the first and second differential pairs.
Dependencies are inferred from the claim text.