Suzhou Metabrain Intelligent Technology Co., Ltd.

Changzhao Fu

Jianguo Wu

An USB circuit includes a USB socket, USB controllers, a switching switch and a power-supply detecting circuit, and the USB controllers include an operating USB controller and an idle USB controller. The operating USB controller is a USB controller normally connected to the switching switch, and the idle USB controller is a USB controller connected to the switching switch when the operating USB controller has abnormality. The switching switch decomposes a USB signal transmitted in the power line of the USB socket into a plurality of channels of signals, and connects the channels of the USB signals obtained by the decomposing to the operating USB controller and the idle USB controller. The power-supply detecting circuit detects whether the power line of the USB socket outputs an electric current of the USB interface in the USB socket to determine whether the USB interface has been accessed by a USB device.

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Jiangsu, China

Changzhao Fu