Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Electrical signal parameter measurement system
Reexamination Certificate
2005-05-10
2005-05-10
Bui, Bryan (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Electrical signal parameter measurement system
C702S060000, C702S062000, C702S065000, C320S107000, C320S108000
Reexamination Certificate
active
06892147
ABSTRACT:
An information handling system includes a power management apparatus which is capable of selectively coupling to primary and secondary batteries that provide portable and backup power to the information handling system. The power management apparatus senses when the voltage at the power input of the information handling system drops below a predetermined threshold voltage. Respective switching diodes between the primary battery and the power input and the secondary battery and the power input are used as a means of fast hardware connection of the selected battery to the power input. Respective bypass switches are connected in parallel with the switching diodes. Control software instructs the bypass switch across the diode associated with the selected battery to close to prevent diode power loss. In this manner, a selected primary or secondary battery is independently switched to the power input, provided the selected battery exhibits a voltage greater than the predetermined threshold voltage.
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Bui Vinh X.
Vyssotski Nikolai V.
Bui Bryan
Dell Products L.P.
Haynes and Boone LLP
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