Patent ID: 8922262

Claim:
A time sequence circuit, comprising: a first to ninth resistor; a first to fifth electronic switch each comprising a first terminal, a second terminal, and a third terminal; and a capacitor; wherein the first terminal of the first electronic switch is coupled to a first power terminal through the first resistor, connected to ground through the second resistor, and the second terminal of the first electronic switch is connected to ground; the first terminal of the second electronic switch is coupled to a second system power terminal through the third resistor, and is connected to ground through the fourth resistor, the second terminal of the second electronic switch is coupled to the third terminal of the first electronic switch, the first terminal of the third electronic switch is coupled to a third system power terminal through the fifth resistor, and is connected to ground through the sixth resistor, the second terminal of the third electronic switch is coupled to the third terminal of the second electronic switch, and the third terminal of the third electronic switch is coupled to a stand-by power terminal through the seventh resistor, and is coupled to the first terminal of the fourth electronic switch; the second terminal of the fourth electronic switch is connected to ground, and the third terminal of the fourth electronic switch is coupled to the stand-by power terminal through the eighth resistor, and is connected to ground through the capacitor; the third terminal of the fourth electronic switch is used to output a power good signal, the first terminal of the fifth electronic switch receives a power on signal, the second terminal of the fifth electronic switch is connected to ground, and the third terminal of the fifth electronic switch is coupled to the third terminal of the fourth electronic switch through the ninth resistor; when the first terminals of the first to fifth electronic switches are at a low-voltage level, the second and third terminals of each electronic switch are disconnected from each other; when the first terminals of the first to fifth electronic switches are at a high-voltage level, the second and third terminals of each electronic switch are connected to each other.