High data rate differential signal line design for uniform characteristic impedance for high performance integrated circuit packages
AssigneeBroadcom Corporation
InventorAmit P. Agrawal
Life of this patent
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Abstract
Provided is an apparatus that includes an integrated circuit (IC) mounted on a chip carrier. The IC has one or more differential pair circuits coupled thereto and the chip carrier has a signal escaping portion and a remaining portion. The apparatus also includes differential signal lines coupled to the differential pair circuits, the differential signal lines (i) extending through the chip carrier and (ii) having first and second segments. The first segment extends through the escaping portion and the second segment extends through the remaining portion. The first and second segments have respective first and second widths.
Claims20
An apparatus comprising:
- an integrated circuit (IC) configured for attachment to a chip carrier, the IC having one or more differential pair circuits coupled thereto, the chip carrier (i) having a signal escaping portion and a remaining portion and (ii) being configured for mounting on a printed circuit board;
- and
- differential signal lines coupled to the differential pair circuits, the differential signal lines (i) extending through the chip carrier and (ii) having first and second segments;
- wherein the first segment extends through the escaping portion and the second segment extends through the remaining portion;
- and
- wherein the first and second segments have respective first and second widths.
A chip carrier configured for (i) mounting on a printed circuit board, and (ii) attachment to an integrated circuit (IC), the IC having a differential circuit coupled thereto, the chip carrier including a signal escaping portion and a remaining portion, comprising:
- differential signal lines extending through the chip carrier and including first and second segments;
- wherein the first segment extends through the signal escaping portion and the second segment extends through the remaining portion;
- wherein the first and second segments have respective first and second widths;
- and
- wherein the first and second widths provide substantially uniform impedance characteristics across the signal lines.
Dependencies are inferred from the claim text.