| 摘要 |
A sequence circuit includes a switch circuit ( 30 ) and a control circuit ( 50 ). The switch circuit has an input terminal connected with a node ( 11 ) and an output terminal connected to a super I/O chip ( 10 ). The control circuit includes a first transistor (Q 4 ) and a second transistor (Q 5 ), the first transistor has a gate connected to the node and a drain connected to a sleep control signal terminal (S 3 '), the second transistor has a base connected to the drain of the first transistor and a collector connected to the super I/O chip. When the computer is off or in one of the sleep states, the node is at low level and the output terminal of the switch circuit outputs a low level signal; when the computer is on, the node is at high level and the output terminal outputs a high level signal.
|
