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公开(公告)号：DE69301128D1
公开(公告)日：1996-02-08
申请号：DE69301128
申请日：1993-04-29
Applicant: IBM
Inventor： SAWDON DAVID , BEETESON JOHN S , BEANLANDS PETER , SMITH KENNETH G
Abstract: An electrical appliance comprises a power supply cable (70) having a first conductor (200) surrounded by a second conductor (210) for supplying electrical power to the appliance from a domestic electricity mains supply, and a connector (490) connected to cable for detachably connecting the conductors of the cable to first and second voltage signals of the electricity mains supply. In operation, the second conductor (210) is connected to the lower of the voltage signals. The second conductor (210) thus acts as a shield in opposition to electric fields radiating from the cable. The shield improves in efficiency as the lower mains voltage signal approaches Ground potential.
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公开(公告)号：DE69018905D1
公开(公告)日：1995-06-01
申请号：DE69018905
申请日：1990-08-30
Applicant: IBM
Inventor： SMITH KENNETH GEORGE , SAWDON DAVID
Abstract: An optical fibre communication link for connecting a peripheral device to a computer system is presented. The communication link includes means for generating a video signal and means for transmitting the signal along an optical fibre between the computer system and the peripheral device. The transmitted video signal includes a reference pulse (1) of predetermined amplitude. Accordingly, there is now provided compensation means (15,16) for correcting changes in the characteristics of a received video signal which result from said optical communication link, and means (17,18) for using said reference pulse in a received video signal in order to control said compensation means. Preferably, the peripheral device is a display device.
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