CONTROL CIRCUIT FOR CONTROLLING DEVICES TO BOOT SEQUENTIALLY

摘要

A control circuit for booting a number of devices in a certain order includes two delay circuits and three switch circuits, the first switch circuit and the first delay circuit receiving a power good signal and a voltage signal from a power supply unit and thus allowing a first device to boot and the first delay circuit outputting a first delay signal after a set time, to the second switch circuit and the second delay circuit, which repeat the process of the first delay circuit and switch circuit, to boot the remaining devices.

主权项

1. A control circuit, comprising:
a first switch circuit comprising a first electronic switch and a second electronic switch, wherein a first end of the first electronic switch is connected to a power supply unit (PSU) and receives a power good signal outputted from the PSU, a second end of the first electronic switch is connected to a first power terminal of the PSU and receives a first voltage outputted from the PSU, a third end of the first electronic is grounded, the second end of the first electronic switch is connected to a first end of the second electronic, a second end of the second electronic switch is connected to the first power terminal and receives the first voltage, a third end of the second electronic switch is connected to a first one of the plurality of devices; wherein when the first electronic switch receives the power good signal, the first and second electronic switches are turned on and the first voltage is transmitted to the first device; a first delay circuit connected to the PSU , the first delay circuit receiving the power good signal, and outputting a first delay signal after a first delay time; and a second switch circuit comprising a third electronic switch and a fourth electronic switch, wherein a first end of the third electronic switch is connected to the first delay circuit and receives the first delay signal, a second end of the third electronic switch is connected to the first power terminal of the PSU and receives the first voltage, a third end of the third electronic switch is grounded, the second end of the third electronic switch is connected to a first end of the fourth electronic switch, a second end of the fourth electronic switch is connected to the first power terminal and receives the first voltage, a third end of the fourth electronic switch is connected to a second one of the plurality of devices; wherein when the third electronic switch receives the first delay signal, the third and fourth electronic switches are turned on, the first voltage is outputted to the second device.