Computer system and matching circuit thereof

摘要

A computer system includes a power supply unit (PSU), a matching circuit, and a chip. The matching circuit includes a voltage conversion unit, a voltage-dividing unit, a first resistor, a comparator, a diode, and a delay unit. The comparator includes a non-inverting terminal electrically coupled to the PSU to receive a power-good signal, an inverting terminal electrically coupled to the voltage-dividing unit to receive a reference voltage, and an output terminal. The delay unit is electrically coupled to a power supply and a power-good signal pin of the chip. When a voltage of the power-good signal is greater than the reference voltage, the output terminal of the comparator outputs a high level signal, the diode is turned off and the power supply is delayed by the delay unit and then output to the power-good signal pin of the chip.

主权项

1. A matching circuit, to match a power supply unit (PSU) with a chip, the matching circuit comprising:
a first resistor; a voltage conversion unit electrically coupled to a first power supply, and configured to convert a voltage of the first power supply into a first voltage; a voltage-dividing unit electrically coupled to the voltage conversion unit and configured to receive the first voltage and divide the first voltage to form a reference voltage; a comparator comprising:
a non-inverting terminal electrically coupled to a first pin of the PSU to receive a power-good signal, and electrically coupled to the first power supply through the first resistor;an inverting terminal electrically coupled to the voltage-dividing unit to receive the reference voltage; andan output terminal; a diode comprising an anode and a cathode electrically coupled to the output terminal of the comparator; and a delay unit electrically coupled to the anode of the diode, a second power supply, and a power-good signal pin of the chip; the matching circuit configured such that, in response to a voltage of the power-good signal output from the first pin of the PSU being greater than the reference voltage, the output terminal of the comparator outputs a high level signal, the diode is turned off, and the second power supply is delayed by the delay unit and then output to the power-good signal pin of the chip.