System power supply apparatus and operational control method
AssigneeRicoh Company, Ltd.
InventorIppei Noda
Life of this patent
Estimating the term…
Abstract
A system power supply apparatus includes a first constant voltage circuit that generates and increases a voltage up to a first constant level when receiving a first control signal. A second constant voltage circuit is provided to generate and increase a voltage up to a second constant level upon receiving a second control signal. The second constant voltage circuit generates and maintains a voltage at a third constant level lower than the second constant level for a prescribed time period upon receiving a third control signal. A control circuit is provided to input the third control signal to the second constant voltage circuit when the system power supply apparatus starts up.
Claims16
A system power supply apparatus, comprising:
- a first constant voltage circuit configured to generate and increase a voltage up to a first constant level when receiving a first control signal;
- a first load connected to the first constant voltage circuit;
- a second constant voltage circuit configured to generate and increase a voltage up to a second constant level upon receiving a second control signal, said second constant voltage circuit generating and maintaining a voltage at a third constant level lower than the second constant level for a prescribed time period upon receiving a third control signal;
- a second load connected to the second constant voltage circuit;
- and
- a control circuit configured to provide the third control signal to the second constant voltage circuit when the system power supply apparatus starts up, said control circuit configured to provide the first control signal to said first constant voltage circuit, said control circuit configured to provide the second control signal to said second constant voltage circuit.
A method of supply power to various loads, comprising the steps of:
- generating a voltage up to a first constant level when receiving a first control signal;
- outputting the first constant level voltage to a first load;
- generating another voltage up to a second constant level upon receiving a second control signal;
- outputting the second constant level voltage to a second load;
- and
- generating and maintaining and outputting a voltage at a third constant level lower than the second constant level for a prescribed time period before said another voltage reaches the second level.
A system power supply apparatus, comprising:
- a first constant voltage circuit configured to generate and increase a voltage up to a first constant level when receiving a first control signal, further configured to connect to a first load;
- a second constant voltage circuit configured to generate and increase a voltage up to a second constant level upon receiving a second control signal, said second constant voltage circuit generating and maintaining a voltage at a third constant level lower than the second constant level for a prescribed time period upon receiving a third control signal, further configured to connect to a second load;
- and
- a control circuit configured to provide the third control signal to the second constant voltage circuit when the system power supply apparatus starts up, said control circuit configured to provide the first control signal to said first constant voltage circuit, said control circuit configured to provide the second control signal to said second constant voltage circuit.
A system power supply apparatus, comprising:
- a first constant voltage circuit configured to generate and increase a voltage up to a first constant level when receiving a first control signal, further configured to connect to a first load;
- a second constant voltage circuit configured to generate and increase a voltage up to a second constant level upon receiving a second control signal, said second constant voltage circuit generating and maintaining a voltage at a third constant level lower than the second constant level for a period of time upon receiving a third control signal, further configured to connect to a second load;
- and
- a control circuit configured to provide the third control signal to the second constant voltage circuit when the system power supply apparatus starts up, said control circuit configured to provide the first control signal to said first constant voltage circuit, said control circuit configured to provide the second control signal to said second constant voltage circuit.
Dependencies are inferred from the claim text.