Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Fa-Qing Xu0
Date of Patent
April 13, 2010
0Patent Application Number
119657640
Date Filed
December 28, 2007
0Patent Primary Examiner
Patent abstract
A power supply protecting circuit configured to protect an electronic device includes a normally open switch, a voltage dropping circuit, a first rectifier, and a relay having a coil and switch. A power terminal of the electronic device is connected to a power terminal of a power supply, the other power terminal of the electronic device is connected to the other power terminal of the power supply via the normally open switch. The power terminal of the electronic device is connected to the other power terminal of the electronic device via the voltage dropping circuit, the first rectifier, and the coil of the relay in turn. The switch of the relay is connected in parallel to the normally open switch.
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