Voltage providing circuit

Details Voltage providing circuit Voltage providing circuit

2008-07-15

2008-07-15

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

With specific source of supply or bias voltage

C327S542000, C327S143000, C327S198000, C361S018000, C361S020000

Reexamination Certificate

active

07400188

ABSTRACT:
A voltage providing circuit includes a protective circuit and a power supply circuit. The protective circuit includes a first transistor. A first control signal is input to a collector of the first transistor, a second control signal is input to a base of the first transistor, an emitter of the first transistor is grounded. The collector of the first transistor is connected to the power supply circuit. The second control signal and the first control signal jointly control the power supply circuit to be turned on or turned off. When the second control signal is at a low level, the first transistor is turned off and the power supply circuit is turned off. When the second control signal is at a high level, the first transistor is turned on and the power supply circuit is turned on. Thus, the providing circuit can prevent the electronic component from being damaged when a computer is restarted.

REFERENCES:
patent: 6404174 (2002-06-01), Boudreaux et al.
patent: 6958583 (2005-10-01), An
patent: 2005/0122644 (2005-06-01), Ma et al.

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