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US 6,724,588 B1Granted
Power supply selector
AssigneeDell USA, L.P.
InventorsJohn A. Cummings, John J. Breen, III
Life of this patent
Estimating the term…
Abstract
A data processing system power supply selection device. The system power supply selector circuit can include a first make-without-break power supply selector module having a power supply input, at least one controlling power supply input, and a system power rail output substantially continuously coupled to said at least a first power supply input.
Claims27
A power supply selection device comprising:
- a first make-without-break power supply selector module having a power supply input,
- at least one controlling power supply input,
- a system power rail output substantially continuously coupled to said power supply input by a plurality of intrinsic body diode P-Channel Field Effect Transistors, and
- a power supply protection circuit having a protection circuit input connected to said power supply input and a protection circuit output connected to said system power rail output.
1 more element
A data processing system comprising:
- a system power rail coupled to the data processing system;
- and
- a first make-without-break power supply selector module having a power supply input,
- at least one controlling power supply input,
- a system power rail output substantially continuously coupled to said power supply input by a plurality of intrinsic body diode P-Channel Field Effect Transistors, and
- a power supply protection circuit having a protection circuit input connected to said power supply input and a protection circuit output connected to said system power rail output.
3 more elements
A method for manufacturing a power supply selection device, said method comprising:
- assembling a first make-without-break power supply selector module
- connecting a power supply protection circuit input to a power supply input of said first make-without-break power supply selector module and connecting a power supply protection circuit output to a system power rail;
- and
- connecting a drain of an intrinsic body diode P-Channel Field Effect Transistor to the power supply input and a source of the intrinsic body diode P-Channel Field Effect Transistor to the system power rail.
1 more element
Dependencies are inferred from the claim text.