Abstract:
A system for delivering power to a processor enables a DC-to-DC converter substrate to be secured to the processor carrier in the Z-axis direction. The ability to assemble the converter to the processor in this way facilitates assembly compared to systems in which the converter is plugged in to the processor carrier in the direction substantially parallel to the surface of the motherboard.
Abstract:
A method and apparatus for drastically reducing timing uncertainties in clocked digital circuits simply, at virtually no cost, and using only standard clock drivers and simple, inexpensive electrical components is described. The method includes the steps of minimizing timing uncertainties by controlling both clock skew and clock jitter. Intrinsic clock skew is eliminated by ganging the outputs of a multi-line clock together onto a capacitive metal island disposed on a printed circuit board (PCB). Extrinsic clock skew is controlled through the use of wide, relatively high-capacitance traces of matched length and disposed on a single, common signal layer of the PCB, each leading to a respective receiver circuit and terminated identically. Clock jitter is controlled by electrically isolating a region of the PCB, disposing the clock driver in the region in such a way as to minimize noise, and providing quiet local power and ground to the region.
Abstract:
Provided is an electrical interconnect cell intermittently spaced across a substrate to form an interconnect device or structure. The interconnect device is fully customizable or programmable upon the upper surface to accommodate various electrical components and connectivity to those components. The electrical interconnect device includes a plurality of intermittently spaced first pairs of upper and lower signal lines interwoven with a plurality of intermittently spaced second pairs of upper and lower signal lines. A bonding pad is arranged between adjacent upper and lower signal line pairs and can be connected thereto with conductive links placed upon the surface layer. Each bonding pad includes one or more pad vias which extend perpendicular to the upper surface to conductive structures arranged in lower layers. Approximately one-half of the array of bonding pads are connected to potential conductors. The pairs of upper signal lines can not only be linked, but also can be cut to form a more direct routing between target locations. Moreover, the upper and lower signal lines are connected in order for traces to extend across the entire interconnect structure for ease of testability.