Patent ID: 8013474

Claim:
An apparatus comprising: a first node; a photovoltaic power source coupled to the first node; a second node to couple to a load; and a power extractor to transfer power from the photovoltaic power source between the first and second nodes, wherein the power extractor, the first node, the power source, and the second node are each part of a single integrated circuit, and wherein the power extractor is to be operated such that impedances of the power extractor are dynamically changed both in response to detected power changes at the source and a capacity of the load to receive power generated by the power source, an output impedance as seen from the second node to be dynamically changed when the load cannot receive all power generated by the power source, to approach matching a first impedance outside the power extractor as seen from the second node, the first impedance including an impedance of the power extractor and the power source coupled to the first node; an input impedance as seen from the first node to be dynamically changed when the load can receive more power than generated by the power source, to approach matching a second impedance outside the power extractor as seen from the first node, the second impedance including an impedance of the power extractor and the load coupled to the second node; and both output and input impedances of the power extractor to be dynamically changed when the load can receive all power generated by the power source.