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US 4,730,122 AGranted
Power supply adapter systems
AssigneeInternational Business Machines Corporation
InventorsJeffrey H. Dreibelbis, Roy C. Flaker, Erik L. Hedberg
Life of this patent
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Abstract
A power supply adapter system is provided which includes a voltage supply source terminal, an output terminal, first and second switches, the first switch being disposed between the voltage supply source terminal and the output terminal, voltage conversion means serially connected with the second switch and disposed between the voltage supply source terminal and a point of reference potential and having an output coupled to the output terminal, and means for detecting first and second ranges of voltages at the power supply source terminal and for producing first and second control voltages, respectively, to control the first and second switches.
Claims25
A power supply adapter system comprising
- a voltage supply terminal,
- an output terminal,
- switching means including first and second switches, said first switch being disposed between said voltage supply terminal and said output terminal,
- voltage conversion means serially connected with said second switch and disposed between said voltage supply terminal and a point of reference potential, said voltage conversion means having an output coupled to said output terminal and,
- means for detecting first and second ranges of voltages at said voltage supply terminal and for producing first and second control signals, respectively, indicative of said first and second ranges of voltages, said first control signal being applied to said first switch and said second signal being applied to said second switch.
2 more elements
A power supply adapter system comprising
- a power supply source terminal having one of first or second voltages applied thereto,
- an output terminal,
- first and second switches, each having a control element, said first switch being connected between said power supply source terminal and said output terminal,
- voltage conversion means having an output for converting said first voltage to a magnitude substantially equal to that of said second voltage, said output being connected to said output terminal and said means being serially connected with said second switch between said power supply source terminal and a point of reference potential,
- means having first and second outputs for detecting said first and second voltages and for producing first and second control voltages on said first and second outputs, said first output being connected to the control element of said first switch and said second output being connected to the control element of said second switch.
2 more elements
A power supply adapter system comprising
- a power supply source terminal,
- an output terminal,
- first and second switches, each having a control element, said first switch being coupled between said power supply source terminal and said output terminal,
- a voltage detector having first and second outputs coupled to said power supply source terminal, said first output being coupled to the control element of said first switch and said second output being coupled to the control element of said second switch and
- a voltage converter coupled to said power supply source terminal and having an output coupled to said output terminal, said second switch being serially connected with said voltage converter.
2 more elements
A power supply adapter system comprising
- a power supply source terminal,
- an output terminal,
- a detector including a first comparator circuit having first and second inputs and an output, a first bias network having an output connected to the first input of said comparator and a control voltage circuit having an output connected to the second input of said comparator,
- a voltage converter including a second comparator circuit having first and second inputs and an output coupled to said output terminal and a second bias network having an output connected to the first input of said second comparator circuit, the second input of said second comparator being connected to said output terminal,
- a first switch having a control element coupled between said power supply source terminal and said output terminal and
- a second switch having a control element serially connected with said voltage converter,
- said output of said first comparator circuit being coupled to the control elements of said first and second switches.
4 more elements
A power supply adapter system comprising
- a power supply source terminal having a voltage applied thereto from within one of first and second ranges of voltages,
- an output terminal,
- switching means disposed between said power supply source terminal and said output terminal,
- voltage conversion means having an output for converting a voltage within said first range of voltages to a voltage within said second range of voltages at said output, said voltage conversion means being coupled to said power supply source terminal and said output being coupled to said output terminal, or
- means for detecting a voltage within the first range of voltages at said power supply source terminal during a first interval of time and activating said voltage conversion means and deactivating said switching means and for detecting a voltage within the second range of voltages at said power supply source terminal during a second interval of time and activating said switching means and deactivating said voltage conversion means.
2 more elements
Dependencies are inferred from the claim text.