Abstract: Systems and methods to charge a battery using a switch modulator and a shaping circuit comprising at least one switching element. The shaping circuit may be configured to receive an input charge supply from a power supply and the switch modulator may be operably coupled with the at least one switching element. Further, the switch modulator may actuate the at least one switching element at a selected duty cycle such that the shaping circuit produces a shaped charge signal, the selected duty cycle configured to vary within a switch modulator sample period.

Abstract: Methods and systems are provided having a tag associated with a moving object are disclosed. An antenna of the tag transmits signals. A Global Positioning System (GPS) obtains GPS data for the tag. An anchor comprises an antenna that receives signals transmitted by the tag at the first frequency. A computer system receives both GPS data and information from the anchor indicative of a distance between the tag and the anchor and determines whether to track a position of the tag. A camera system includes a communication system that receives information about the position of the tag from the computer system. The camera system includes a camera control system that controls a position of a camera based on received information about the position of the tag from the computer system.