Dual voltage switching circuit
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United States of America Patent
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Aug 16, 2011
Grant Date -
Feb 11, 2010
app pub date -
Sep 15, 2008
filing date -
Aug 11, 2008
priority date (Note) -
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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.
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