Board impedance management
AssigneeIntel Corporation
InventorRonald Martin
Life of this patent
Estimating the term…
Abstract
A system and method are disclosed in which separate impedance compensation circuitry is allocated for an interface according to the space occupied on a printed circuit board (PCB) by the interface. Where an interface occupies two or more layers of the PCB, an impedance compensation circuit is dedicated to each layer on behalf of the interface. By dedicating impedance compensation, not just to the interface alone, but to the physical space occupied by the interface, the system and method are able to exploit multiple-layer and same-layer trace impedances, save board space and/or provide AC timings recovery.
Claims17
A system comprising:
- an interface comprising a first portion and a second portion, where the first portion populates a first layer of a printed circuit board and the second portion populates a second layer of the printed circuit board, wherein signals are transmitted between the first portion and the second portion;
- and
- an impedance compensation circuit residing on the first layer of the printed circuit board and coupled to the first portion of the interface, wherein the first impedance compensation circuit controls the impedance of signals associated with the first portion of the interface but does not control the impedance of signals associated with the second portion of the interface.
A method comprising:
- identifying an interface of a system, the interface comprising a first portion and a second portion, wherein the first portion populates a first layer of a printed circuit board and the second portion populates a second layer of the printed circuit board;
- and
- associating a first impedance compensation circuit with the first portion, wherein the first impedance compensation circuit controls the impedance of signals pertaining to the first portion of the interface but does not control the impedance of signals pertaining to the second portion of the interface.
Dependencies are inferred from the claim text.