Title: Universal serial bus interface electrostatic protective circuit and device
Application Number: 200520005683 Application Date: 2005.03.14
Publication Number: 000000000 Publication Date:
Approval Pub. Date: 2006.04.12 Granted Pub. Date: 2006.04.12
International Classifi-cation: H01R13/66;H05F3/00
Applicant(s) Name: Lenovo (Beijing) Co., Ltd. Address:
Inventor(s) Name: Du Chunhai;Li Xiaolong;Ou Yuhai;Yin Wei;Liu Peiji
Attorney & Agent: dai changmeng
Abstract:
    The utility model discloses a universal serial bus interface electrostatic protective circuit including a first group of diodes, a second group of diodes, a third group of diodes and a fourth group of diodes. Each group of diodes includes a diode at least. The positive electrodes of the first group of diodes are connected to the negative electrodes of the second group of diodes and attached to the first signal wire of the universal serial interface. The positive electrodes of the third group of diodes are connected to the negative electrodes of the fourth group of diodes and attached to the second signal wire of the universal serial interface. The negative electrodes of the first group of diodes and the second group of diodes are connected to the power supply for effusing the forward direction high voltage to the power supply. The positive electrodes of the second group of diodes are connected to the positive electrodes of the fourth group of diodes for effusing the reverse direction high voltage to the earth. The utility model is connected to the low capacitance diode by the two signal lines of the universal serial bus interface so that it can effuse the forward direction high voltage to the power supply and the reverse direction high voltage to the earth. So it can prevent the universal serial interface from the disturbance from the electrostatic high pressure.
Time: 15
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