Dual voltage switching circuit

Details Dual voltage switching circuit Dual voltage switching circuit

2011-08-16

2011-08-16

Lee, Thomas (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C365S229000

Reexamination Certificate

active

08001408

ABSTRACT:
A dual voltage switching circuit includes a first resistor and two transistors. Each transistor has a first terminal, a second terminal, and a third terminal. The first terminals are connected to a control terminal of a computer. The second terminals are connected to a standby power supply of the computer. The third terminals are connected to a power-on terminal of the computer via the first resistor. When the first terminals receive a low level signal from the control terminal, the first and second transistors are on, and the power-on terminal receives a voltage form the standby power supply via the first resistor.

REFERENCES:
patent: 4532443 (1985-07-01), Glennon
patent: 5384747 (1995-01-01), Clohset
patent: 5815455 (1998-09-01), Braithwaite et al.
patent: 6523128 (2003-02-01), Stapleton et al.
patent: 6775784 (2004-08-01), Park
patent: 7774633 (2010-08-01), Harrenstien et al.
patent: 2008/0168288 (2008-07-01), Jia et al.

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