Patent ID: 9122469
Filing Date: 2015-09-01
Classification: G06F

Abstract:
1. An expansion card, comprising: first to third resistors; a standby voltage output terminal; an edge connector comprising a plurality of power pins, a plurality of ground pins, a plurality of signal pins, and an idle pin; a first electronic switch comprising a first terminal connected to the idle pin of the edge connector, a second terminal grounded, and a third terminal connected to a standby power through the first resistor; a second electronic switch comprising a first terminal connected to the third terminal of the first electronic switch, a second terminal grounded, a third terminal connected to the standby power through the second resistor; a third electronic switch comprising a first terminal connected to the third terminal of the first electronic switch, a second terminal grounded, a third terminal connected to a first system power through the third resistor; a fourth electronic switch comprising a first terminal connected to the third terminal of the third electronic switch, a second terminal connected to a second system power, a third terminal connected to the standby voltage output terminal; and a fifth electronic switch comprising a first terminal connected to the third terminal of the second electronic switch, a second terminal connected to the standby voltage output terminal, a third terminal connected to the standby power; wherein when the first electronic switch receives a high level signal through the idle pin of the edge connector, the first electronic switch is turned on, the second, third, and fifth electronic switches are turned off, the fourth electronic switch is turned on, the second system power outputs a standby voltage through the standby voltage output terminal; when the first electronic switch receives a low level signal through the idle pin of the edge connector, the first electronic switch is turned off, the second and third electronic switches are turned on, the fourth electronic switch is turned off, the fifth electronic switch is turned on, the standby power outputs a standby voltage through the standby voltage output terminal.