There is provided an input/output device having of not exerting any adverse influence on other expansion devices connected to a system bus at the time of insertion or removal. An expansion device 800 comprises an electronic circuit 400 and a MOS switch 300, and is connected to a system bus (BUS) via...http://www.google.com.au/patents/US6289407?utm_source=gb-gplus-sharePatent US6289407 - Input/output device for connection and disconnection of active lines
