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专利名称：USB circuit device for preventing reverse
current from external device
发明人：Cheol-ho Lee申请号：US11580932申请日：20061016
公开号：US2007008A1公开日：20070419
专利附图：
摘要：A USB circuit device prevents reverse current while complying with USBspecifications. A USB circuit device includes a connector unit to which a USB device isconnected; a power supplying unit supplying power with the USB device through the
connector unit; a switching unit flowing current induced into the connector unit from theUSB device, into a ground selectively; and a controller controlling the switching unit toflow the current induced into the connector unit, into the ground if a level of the powerprovided with the USB device by the power supplying unit is less than a predeterminedvalue. Accordingly, there is provided a USB circuit device for preventing reverse currentfrom an external device and capable of protecting the circuit from over current withsatisfaction to a USB specification.
申请人：Cheol-ho Lee
地址：Suwon-si KR
国籍：KR
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