Computer apparatus with over-voltage protection function

Details Computer apparatus with over-voltage protection function Computer apparatus with over-voltage protection function

2007-09-15

2009-12-29

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

Reexamination Certificate

active

07639466

ABSTRACT:
The present invention discloses a computer apparatus with over-voltage protection function, wherein the over-voltage protection device is electrically connected between the central processing unit (CPU) and the power supply to protect the CPU from damage under the condition of over-voltage failure. The over-voltage protection device comprises a first voltage comparison unit, a reference voltage unit, a second voltage comparison unit, a trigger unit, and a circuit switch unit; wherein, the first voltage comparison unit is used to compare the output voltage from the power supply with the default lower and upper voltage limits, and output a first potential signal; the reference voltage unit is used to output the reference voltage based on the first potential signal; the second voltage comparison unit is used to compare the core voltage of CPU with the reference voltage, and output a second potential signal when the core voltage of CPU is larger than the reference voltage; the trigger unit is used to accept the trigger of the second potential signal, and output a first trigger signal and a second trigger signal; and, the circuit switch unit is used to accept the trigger of the second trigger signal, and close the electrical connection between CPU and the power supply.

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