Device and method for examining usb port of test apparatus
A universal serial bus and test equipment technology, applied in measuring devices, error detection/correction, measuring electricity, etc., can solve problems such as unstable power supply, no power supply, insufficient power supply, etc.
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[0024] In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are used in conjunction with the accompanying drawings to give a detailed description of the present invention. The description is as follows:
[0025] First see figure 1 , Is a circuit diagram of a detection device for detecting a USB port of a test device in an embodiment of the present invention. The detection device of the present invention includes a USB connector 101, a connection unit 103, and a warning unit 105.
[0026] General USB connectors have power supply pins VBUS, ground pins GND, signal pins DM and DP. The present invention uses the voltage originally provided by the USB port as the judgment basis. When the voltage provided by the USB port of the test equipment is abnormal, the voltage difference between the power supply pin VBUS and the ground pin GND will deviate from the voltage that the USB port should supply, which should be about...
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