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US 12,652,753 B2Granted
Balancing loss across all ports on printed circuit board traces
AssigneeCisco Technology, Inc.
InventorsMike Sapozhnikov, Joel Richard Goergen, David Nozadze, Amendra Koul, Upen Reddy Kareti, Sayed Ashraf Mamun
Life of this patent
Estimating the term…
Abstract
In some aspects, the techniques described herein relate to a printed circuit board, comprising a layer, a first trace coupled to the layer and carrying a first signal; a second trace coupled to the layer and carrying a second signal; and a loss introducing feature that creates an additional signal loss in one of the first trace or the second trace, wherein the additional signal loss balances a first signal loss and a second signal loss.
Claims20
A printed circuit board, comprising:
- a layer;
- a first trace coupled to the layer and carrying a first signal, the first trace having a first end and a second end opposite the first end, the first signal in the first trace encountering a first signal loss between the first end and the second end;
- a second trace coupled to the layer and carrying a second signal, the second trace having a third end and a fourth end opposite the third end, the second signal in the second trace encountering a second signal loss between the third end and the fourth end;
- and
- a loss introducing feature that creates an additional signal loss in one of the first trace or the second trace, a sum of the additional signal loss and the one of the first trace or the second trace is approximately the same as the other of the first trace or the second trace, wherein the additional signal loss balances the first signal loss and the second signal loss.
2 more elements
A printed circuit board, comprising:
- a layer having a first portion and a second portion, the first portion being formed of a first material, the second portion being formed of a second material, the second material having different dissipation properties from the first material;
- a first trace coupled to the layer and carrying a first signal, the first trace having a first end and a second end opposite the first end, the first trace being proximate to the first material and having a first length;
- and
- a second trace coupled to the layer and carrying a second signal, the second trace having a third end and a fourth end opposite the third end, the second trace being proximate to the second material and having a second length, the second length being greater than the first length, wherein the first material induces a first signal loss in the first trace, the second material induces a second signal loss in the second trace, and the first material and the second material create signal losses in the first trace and in the second trace respectively such that signal losses in the first trace and in the second trace are substantially the same.
1 more element
A printed circuit board, comprising:
- a layer having a loss balancing feature, the loss balancing feature including a first portion of the layer being formed of a first resin material having first dissipation properties and a second portion of the layer being formed of a second resin material having second dissipation properties, the second dissipation properties being different from the first dissipation properties;
- a first trace coupled to the layer and in contact with the first portion, the first trace having a first length and extending from a first end to a second end, the first trace carrying a first signal that has a first strength at the first end and a second strength at the second end;
- and
- a second trace coupled to the layer and in contact with the second portion, the second trace having a second length and extending from a third end to a fourth end, the second trace carrying a second signal that has a third strength at the third end and a fourth strength at the fourth end, wherein the second length is greater than the first length, the first strength is substantially the same as the third strength, and the second strength is substantially the same as the fourth strength due to the loss balancing feature of the layer causing a signal loss in the first trace to be substantially the same as a signal loss in the second trace.
1 more element
Dependencies are inferred from the claim text.