Circuit for protecting computer

  • US 7,679,224 B2
  • Filed: 07/16/2007
  • Issued: 03/16/2010
  • Est. Priority Date: 12/22/2006
  • Status: Expired due to Fees
First Claim
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1. A circuit for preventing a computer from being powered up before a CPU voltage of the computer is prepared properly, the circuit comprising:

  • a power supply for providing power to the computer;

    a power button for powering on the computer;

    a power controller comprising an input terminal connected to the power button and an output terminal for electrical connection to the power supply, the power controller being configured for receiving a PWRBT# signal via the input terminal thereof when the power button is momentarily triggered, and outputting a PSON# signal to the power supply via the output terminal to control the power supply to provide the electrical power to the computer, in response to the received PWRBT# signal;

    a switch serially connected between the output terminal of the power controller and the power supply, the switch comprising a control terminal configured for monitoring if the CPU voltage is prepared properly so as to control conduction of the switch and further to control connection between the output terminal and the power supply.

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