Abstract: A printed circuit board includes a signal layer and a supply voltage plane layer. The signal layer includes traces to communicate signals that are not associated with regulated supply voltages. The supply voltage plane is embedded in the signal layer to supply power to multiple supply voltage pins of a component that is mounted to the printed circuit board. The printed circuit board may also include a supply voltage plane layer to communicate a supply voltage. A ground plane may be embedded in the supply voltage plane layer to provide ground connections to multiple pins of the component.

Abstract: A printed circuit board includes a signal layer and a supply voltage plane layer. The signal layer includes traces to communicate signals that are not associated with regulated supply voltages. The supply voltage plane is embedded in the signal layer to supply power to multiple supply voltage pins of a component that is mounted to the printed circuit board. The printed circuit board may also include a supply voltage plane layer to communicate a supply voltage. A ground plane may be embedded in the supply voltage plane layer to provide ground connections to multiple pins of the component.

Abstract: A method and an apparatus reduce peak electro-magnetic (EM) emissions from power and ground planes in, for example, a printed circuit board (PCB) by phase shifting synchronous signal sources to distribute EM emissions over a frequency range and by canceling at least some EM emissions with an inverse signal. According to one aspect of the present invention, two signal sources provide periodic outputs having the same period. The output of one of the signal sources, however, is delayed with respect to the output of the other signal source. Each signal source is coupled to a signal trace. The propagation delay over the signal trace coupled to the delayed signal source is shorter than the propagation delay over the other signal trace by the amount of the delay between the respective output signals. According to another aspect of the present invention, a noise cancellation driver is coupled to a signal source, a power or ground plane of the signal source, and an inverse voltage plane.