Apparatus for switching a bus power line to a peripheral device

Details Apparatus for switching a bus power line to a peripheral device Apparatus for switching a bus power line to a peripheral device

1998-02-11

2000-05-16

Thai, Xuan M.

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

710129, G06F 1300

Patent

active

060650796

ABSTRACT:
An apparatus reduces inductive coupling and cross-talks in a bus which is connected to a combination of differential devices and single-ended devices. Each differential device has a positive line and a negative line. The positive line is provided to an input of another device on a bus as normal. The negative line of the differential device is routed by a switch in accordance with the invention. The switch receives from the bus a sensing signal which is asserted when at least one single-ended device is connected to the bus. When the sensing signal is asserted, the switch grounds the negative line of the differential device. Alternatively, if all devices on the bus are differential devices, the switch connects the negative lines of the differential devices together and acts as a pass-through for the negative signal.

REFERENCES:
patent: 5553250 (1996-09-01), Miyagawa et al.
patent: 5570037 (1996-10-01), Llorens
patent: 5603039 (1997-02-01), Strevey
patent: 5608883 (1997-03-01), Kando et al.
patent: 5864715 (1999-01-01), Zani et al.

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