Patent 7921308 was granted and assigned to Akros Silicon on April, 2011 by the United States Patent and Trademark Office.
Embodiments disclosed herein describe a network interface device including a first powered device controller coupled to first and second power supply lines. A second powered device controller coupled to third and fourth input power supply lines. A dc-dc converter coupled to receive a single signal representing a sum of power signals output by the first and second powered device controllers.