Patent ID: 7286005

Claim:
A supply voltage switching circuit for a computer, the supply voltage switching circuit comprising: a chipset outputting a voltage for the computer, the chipset comprising: a first metal-oxide-semiconductor field-effect transistor (MOSFET), a gate of the first MOSFET receiving a first system voltage, a source of the first MOSFET receiving a second system voltage; and a second MOSFET, a gate and a source of the second MOSFET separately receiving a standby voltage, a drain of the second MOSFET connected to a drain of the first MOSFET; a first transistor having a first end and a second end, the first end receiving a control signal from the computer; a second transistor having a first end and a second end, the first end connected to the second end of the first transistor, the second end receiving the first system voltage and connected to the gate of the first MOSFET; and a third transistor having a first end and a second end, the first end connected to the second end of the first transistor, the second end receiving the standby voltage and connected to the gate of the second MOSFET.