COMPUTER SYSTEM AND POWER CIRCUIT THEREFOR

摘要

A computer system includes a display, a motherboard and a power circuit. The display includes a video interface. The motherboard includes a super input-output (SIO) chip. The power circuit includes a first switch unit, a second switch unit, a third switch unit, and an oscillator. When the display is powered on, the video interface outputs a high level signal, the first switch unit is turned on, a power supply powers the oscillator through the first switch unit. The oscillator operates and outputs a high level signal, the second switch unit is turned on, a power-on signal pin of the SIO chip receives a low level signal, and the motherboard is turned on.

主权项

1. A computer system comprising:
a display comprising a video interface; a motherboard comprising a super input-output (SIO) chip comprising a power-on signal pin; a power supply unit (PSU) configured to generate a power-good signal; and a power circuit comprising:
a first switch unit electrically coupled to the video interface and a power supply;a second switch unit electrically coupled to the power-on signal pin;a third switch unit electrically coupled to the first switch unit, and electrically coupled to the PSU and configured to receive the power-good signal; andan oscillator electrically coupled to the first switch unit and the second switch unit; the computer system configured such that, in response to the display being turned on, the video interface outputs a high level signal to turn on the first switch unit, the power supply powers the oscillator through the first switch unit, the oscillator operates and outputs a high level signal to turn on the second switch unit, the power-on signal pin of the SIO chip receives a low level signal, the motherboard is turned on, the power-good signal outputted from the PSU turns to a high level, the third switch unit is turned on, the first switch unit is turned off, the oscillator does not operate, the second switch is turned off, the power-on signal pin of the SIO chip receives a low level signal, and the motherboard operates.