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| Semiconductor light detecting integrated circuit |
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| Boiling water neutronic reactor incorporating a process inherent safety design |
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| Handling pool and safety water reserve for pressurized water-cooled nuclear reactor |
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| Steam separator latch assembly |
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| Printer |
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| Network interface device employing a DMA command queue |
| OF THE PREFERRED EMBODIMENTS FIG. 2 is a diagram of a network interface device 200 in accordance ... |
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| Power amplifier with power monitor circuit |
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Hot swap system
| Details |
Inventors: Lascu, Michael A.; Eckblad, Michael Z.; Peil, Brian R.; Gordon, Glen P.; Flamm, Ron; Plitt, Dan C.; Eylon, Eryan; Sutherland, Ronald B.; Anderson, Mark W.;
Assignee: Intel Corporation (Santa Clara, CA)
Primary Examiner: Vo; Tim
Assistant Examiner:
Attorney, Agent or Firm: Steiner; Paul E.
A system to connect cards in a chassis is provided. The system includes a chassis frame having a slot to receive a card. A rocker is coupled to the chassis frame and positioned in a closed state when the card is in the slot. A magnetic element is positioned on the rocker and a sensor positioned to detect a magnetic field generated by the magnetic element. The sensor then determines whether the rocker is positioned an open state or said closed state. |
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DETAILED DESCRIPTION A method and apparatus for a non-contact hot swap system is provided.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention.
It will be understood, however, to one skilled in the art, that the present invention may be practiced without some or all of these specific details.
In other instances, well known process operations have not been described in detail in order not to unnecessarily obscure the present invention.
FIG.
2A is an illustration of a non-contact hot swap system 30 in a closed state in accordance with one embodiment of the present invention.
Non-contact hot swap system 30 includes chassis frame 12 for receiving card 16.
Card 16 may be a PCI card, however as is well known in the art, other types of cards may be used.
A rocker 32 in a closed state secures card 16 to a slot (not shown).
Rocker 32 includes a hinge 34 and a magnetic element 36.
Rocker 32 is rotably coupled to chassis frame 12 through a hinge 34.
Non-contact hot swap system 30 also includes a PCB 38 coupled to chassis frame 12.
PCB 38 also includes a sensor 40.
Magnetic element 36, one example of which is a magnet, generates a magnetic field 42, which may be detected by sensor 40 depending on its proximity to sensor 40.
Sensor 40 may be located anywhere on the board that facilitates state change in the switch during closing of the rocker.
When rocker 32 is in a closed state (as shown in FIG.
2A), sensor 40 detects the magnetic flux lines of magnetic field 42 in a perpendicular manner and relays the detection to PCB 38.
The logic of PCB 38 may be programmed to read either an open or a closed state for the rocker depending on the state of sensor 40.
The strength of magnetic field 42 detected by sensor 40 when rocker 32 is in a closed state is preferably about 60 to about 100 Gauss, and more preferably about 100 Gauss.
In the closed state, PCB 38 continually monitors magnetic field 42 through sensor 40 and enables power to card 16
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I/O Systems 
