Operating_systems-page16 - Jelena Mamenko Operating Systems...

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Jelena Mamčenko Operating Systems Lecture Notes on Operating Systems 16 it is connected to an electrical outlet as high voltages may be present even while the unit is switched off. In desktop computers, the power supply is a small (PSU) box inside the computer; it is an important part of the computer because it provides electrical power in a form that is suitable for every other component inside or attached to the computer in order for it to work. If only a small voltage is needed, the mains power needs to be transformed to a suitable level in order for the component to work. In portable computers there is usually an external power supply that produces low voltage DC power from a mains electrical supply (typically a standard AC wall outlet). Circuitry inside the portable computer uses this transformed power to charge the battery as needed, in addition to providing the various voltages required by the other components of the portable computer. 11.1
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This note was uploaded on 12/29/2011 for the course CSE 362 taught by Professor Mavin during the Spring '09 term at SUNY Stony Brook.

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