Universal USB power supply

Details Universal USB power supply Universal USB power supply

2011-03-29

2011-03-29

Stiglic, Ryan M (Department: 2111)

Electrical computers and digital processing systems: support

Computer power control

C710S305000

Reexamination Certificate

active

07917781

ABSTRACT:
A universal series bus (USB) power supply has a DC power source, a USB power interface and a voltage modulation module. The USB power interface is for connecting to an electronic device that stores a default D+ voltage and a default D− voltage. The voltage modulation module connects to and outputs signals to the D+ and D− terminals of the USB power interface. If voltage levels of the output signals are not respectively identical to the default D+ and D− voltages, the voltage modulation module changes the voltage levels of the signals output to the D+ and D− terminals of the USB power interface until the voltage levels of the output signals are respectively identical to the default D+ and D− voltages. Therefore, the USB power supply may be applied to any kind of electronic device that is charged over a USB interface.

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“Battery Charging Specification”; Revision 1.0; Mar. 8, 2007; all pages.

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