Apparatus for hot removal from/insertion to a connection bus of

Details Apparatus for hot removal from/insertion to a connection bus of Apparatus for hot removal from/insertion to a connection bus of

1989-06-08

1992-10-20

Anderson, Lawrence E.

Boots, shoes, and leggings

395800, 364DIG2, 3649461, 3649521, 3649402, G06F 1300

Patent

active

051577712

ABSTRACT:
Apparatus for hot removal from/insertion to a connection bus of a non-removable-media magnetic recording unit, comprising a plurality of electromagnetic switches for isolation of the signal terminals of the unit from the bus, thereby preventing noise injection into the bus; control and timing circuits for deenergization of the unit only after opening of the switches and for enabling removal of the unit only after deenergization and circuits for imparting to the signal terminals of the unit a bias voltage intermediate or close to the electrical signal levels present on the bus, the insertion occurring by closing the switches when the unit is already powered and the terminals are biased so as to minimize the amplitude of the noise injected onto the bus.

REFERENCES:
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patent: 4454552 (1984-06-01), Barnes et al.
patent: 4754397 (1988-06-01), Varaiya et al.
patent: 4800462 (1989-01-01), Zacher et al.
patent: 4835737 (1989-05-01), Herrig et al.
patent: 4870643 (1989-09-01), Baltman et al.
patent: 4893210 (1990-01-01), Mintzlaff
patent: 4912580 (1990-03-01), Hanson
patent: 4914656 (1990-04-01), Dunphy, Jr. et al.
patent: 4937806 (1990-06-01), Babson et al.
patent: 5065262 (1991-11-01), Blackborow et al.
patent: 5077722 (1991-12-01), Geist et al.

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