Electrical computers and digital processing systems: support – Computer power control
Patent
1996-10-31
1999-06-29
Sheikh, Ayaz R.
Electrical computers and digital processing systems: support
Computer power control
713320, 713340, G06F 100
Patent
active
059163135
ABSTRACT:
Method and apparatus for providing a regulated, direct current (DC) output voltage for use in computers. An unregulated voltage source is regulated by a power converter of the present invention that produces the regulated voltage reliably, inexpensively, and without requiring heat sinks or auxiliary fans. In a preferred embodiment, the power converter includes a buck regulator and a control circuit. The control circuit includes a resistor-divider feedback loop connected to the output of the buck regulator in order to provide a feedback voltage. The feedback voltage is supplied to an error amplifier which compares the feedback voltage to an internal reference voltage and produces an output that is the amplified difference between the two voltages. The amplified output is then provided to a frequency modulation (FM) port of a multipurpose timer. As a result, the timer can control and modulate the frequency and pulse width of the buck regulator.
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Dell U. S. A., L.P.
Sheikh Ayaz R.
Vo Tim
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