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US 6,713,992 B2Granted
Method and apparatus for power supply capable of effectively reducing a power consumption
AssigneeRicoh Company, Ltd.
InventorsMasahiro Matsuo, Shohichi Nitta
Life of this patent
Estimating the term…
Abstract
A power supply apparatus includes a DC-to-DC converter performing a voltage conversion converting a voltage of a source power supplied from a direct current power source to a first predetermined voltage lower than the voltage of the source power and a voltage regulator carrying out a voltage regulation for regulating the first predetermined voltage of the source power output from the DC-to-DC converter to at least a second predetermined voltage lower than the first predetermined voltage.
Claims39
A power supply apparatus, comprising:
- a DC-to-DC converter-for-converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said, first predetermined voltage being lower than said voltage of said power source;
- and
- a voltage regulator for regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage,
- wherein said DC-to-DC converter is turned into a non-active state to stop said voltage conversion and passes said voltage of said power source when an operation mode is changed to a sleep mode.
1 more element
A power supply apparatus, comprising:
- a DC-to-DC converter for converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said first predetermined voltage being lower than said voltage of said power source;
- and
- a voltage regulator for regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage,
- wherein said DC-to-DC converter outputs said voltage of said power source without performing said voltage conversion when an operation mode is changed to a sleep mode.
1 more element
A power supply apparatus, comprising:
- converting means for performing a DC-to-DC conversion for converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said first predetermined voltage being lower than said voltage of said power source;
- and
- regulating means for carrying out a voltage regulation for regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage,
- wherein said converting means is turned into a non-active state to stop said voltage conversion and straight passes said voltage of said power source when an operation mode is changed to a sleep mode.
1 more element
A power supply apparatus, comprising:
- converting means for performing a DC-to-DC conversion for converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said first predetermined voltage being lower than said voltage of said power source;
- and
- regulating means for carrying out a voltage regulation for regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage,
- wherein said converting means outputs said voltage of said power source without performing said voltage conversion when an operation mode is changed to a sleep mode.
1 more element
A method of supplying, comprising the steps of:
- DC-to-DC converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said first predetermined voltage being lower than said voltage of said power source;
- regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage;
- and
- stopping said DC-to-DC conversion and passing said voltage of said power source straight through from a DC-to-DC converter to a voltage regulator when an operation mode is changed to a sleep mode.
1 more element
A method of supplying power, comprising the steps of:
- DC-to-DC converting a voltage of a power source supplied from a direct current power source to a first predetermined voltage, said first predetermined voltage being lower than said voltage of said power source;
- regulating said first predetermined voltage to at least a second predetermined voltage, said second predetermined voltage being lower than said first predetermined voltage;
- and
- outputting said voltage of said power source without performing said DC-to-DC converting step when an operation mode is changed to a sleep mode.
1 more element
Dependencies are inferred from the claim text.