发明名称 |
Adapter design for dual sourced power |
摘要 |
A communications adapter card includes a circuit arrangement for causing an electrical voltage to be supplied to the card from a first voltage source, even if a second voltage source is available, and from the second voltage source if the first voltage source is not available. The circuit arrangement includes a Field Effect Transistor (FET) with its gate electrode connected to a control circuit which puts the FET in an off-state to inhibit the second voltage source from supplying voltage to the card if the first voltage source is available, and puts the FET in an on-state to supply voltage to the card if the first voltage source is not available. The invention makes it possible for a single communications adapter card to be used to attache power managed and non-power managed personal computers (PCs) to a Local Area Network (LAN).
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申请公布号 |
US5739597(A) |
申请公布日期 |
1998.04.14 |
申请号 |
US19960661273 |
申请日期 |
1996.06.10 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BAILEY, WARREN D.;NAJM, ELIE M.;WELLS, ROBIN C. |
分类号 |
G06F1/26;H04L12/10;H04L12/12;(IPC1-7):H04L12/40 |
主分类号 |
G06F1/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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