Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
August 30, 2011
Patent Application Number
12553474
Date Filed
September 3, 2009
Patent Primary Examiner
Patent abstract
An interface circuit for connecting with a universal serial bus (USB) data cable includes a USB connector for connecting with the USB data cable, an over voltage protection (OVP) circuit connected to the USB connector, and a time delay circuit connected to the USB connector and the OVP circuit to control the OVP circuit. The OVP circuit is switched off in a predetermined delay time of the time delay circuit when the USB data cable is connected to the USB connector, and is then switched on after the delay time of the time delay circuit.
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