Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
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.
Huang Yong-Zhao
Li Yun
Hon Hai Precision Industry Co. Ltd.
Hong Fu Jin Precision Industry ( ShenZhen) Co., Ltd.
Morris Manning & Martin LLP
O'Toole Colleen
Tingkang Xia, Esq. Tim
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