Abstract:
A backplane for a computing system may include a connector configured to provide a detachable mechanical coupling with a circuit board, and an optical signal path configured to carry optical signals. In addition, an optical bypass switch may be configured to couple optical signals from the optical signal path to the circuit board and to couple optical signals from the circuit board to the optical signal path responsive to an enabling signal. The optical bypass switch may be further configured to transmit optical signals therethrough to bypass the circuit board responsive to an absence of the enabling signal. Related circuit boards, computing systems, bypass switches, and methods are also discussed.
Abstract:
An apparatus electrically interconnects pins that project from the rear side of a backplane in separate arrays corresponding to respective circuit boards at the front side of the backplane. The apparatus comprises a connector board assembly extending across the rear side of the backplane between separate arrays of pins. The connector board assembly has signal routing circuitry that electrically interconnects those separate arrays of pins. This enables the respective printed circuit boards to be electrically interconnected independently of any signal routing circuitry within the structure of the backplane. Accordingly, the apparatus preferably includes a backplane that is free of signal routing circuitry for interconnecting pins that extend through the backplane.
Abstract:
The invention relates to a method and a device for pseudo-differential transmission in interconnections used for sending a plurality of electrical signals The ends of an interconnection (1) having 4 transmission conductors and a return conductor (10) distinct from the reference conductor (7) are each connected to a termination circuit (4). Three damping circuits (8) are connected between the return conductor (10) and the reference conductor (7). The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the conductors of the interconnection (1). The receiving circuits (6) are connected to the conductors of the interconnection (1), each receiving circuit (6) being such that the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3) without noticeable external crosstalk.
Abstract:
A plurality of memory modules (130) lies within the airflow created by the cooling fans and includes modules arranged in a plurality of pairs of memory modules aligned in substantially the same direction as airflow. Each pair has a first memory module and a second memory module, the first and second memory modules each have a length, and the first memory module and the second module are disposed such that the length of the first memory module is in a substantially parallel relationship with respect to the length of the second memory module. A portion (136) of the length of the first memory module is disposed between another pair of memory modules.
Abstract:
The drilling and plating of high aspect ratio blind via holes in a multilayer printed circuit board are disclosed. A via hole is drilled through a sub-composite structure. The walls of the via hole are plated with a conductive material, and the hole is filled with a conductive medium. The sub-composite structure proceeds through the remainder of the processing that is necessary to manufacture the printed circuit board up to the completion of the solder mask step. The conductive medium of the via hole is drilled out to achieve a hole size that is of the desired diameter as required by the printed circuit board design.
Abstract:
Die Erfindung betrifft eine Backplane für einen elektronischen Baugruppenträger mit einer Grundbackplane (1) mit mehreren Kontaktleisten, wobei auf der Grundbackplane (1) ein Freiraum vorgesehen ist, in welchen wenigstens eine Zusatzbackplane (3) einsetzbar ist.
Abstract:
An orthogonal backplane connector systems having midplane footprints that provide for continuity of impedance and signal integrity through the midplane and allow for the same connector to be coupled to either side of the midplane. This design creates an orthogonal interconnect without taking up unnecessary PCB real estate. The midplane circuit board may include a first differential signal pair of electrically conductive vias disposed in a first direction, and a second differential signal pair of electrically conductive vias disposed in a second direction that is generally orthogonal to the first direction.
Abstract:
A midplane has a first side to which contact ends of a first differential connector are connected and a second side opposite the first side to which contact ends of a second differential connector are connected. The midplane includes a plurality of vias extending from the first side to the second side, with the vias providing first signal launches on the fist side and second signal launches on the second side. The first signal launches are provided in a plurality of rows, with each row having first signal launches along a first line and first signal launches along a second line substantially parallel to the first line. The second signal launches are provided in a plurality of columns, with each column having second signal launches along a third line and second signal launches along a fourth line substantially parallel to the third line.