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US 7,746,049 B2Granted
Power supply device and recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorTakashi Sato
Life of this patent
Estimating the term…
Abstract
A power supply device includes a DC-DC converter configured to regulate an output voltage based on an externally input instruction, and a discharge circuit connected to an output capacitor of the DC-DC converter, wherein the discharge circuit includes a switch element configured to switch between a conductive state and a nonconductive state according to an instruction, and a capacitor-resistor (C-R) circuit configured to charge electric charge accumulated in the output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground when the switch element is nonconductive.
Claims10
A power supply device comprising:
- a DC-DC converter configured to regulate an output voltage based on an externally input instruction;
- and
- a discharge circuit connected to an output capacitor of the DC-DC converter, wherein the discharge circuit includes,
- a switch element configured to switch between a conductive state and a nonconductive state according to an instruction;
- and
- a capacitor-resistor (C-R) circuit configured to charge electric charge accumulated in the output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground while the switch element is nonconductive.
3 more elements
A power supply device comprising:
- a DC-DC converter configured to regulate an output voltage based on an externally input instruction;
- and
- a discharge circuit connected to an output line of the DC-DC converter, wherein the discharge circuit includes,
- a switch element configured to switch between a conductive state and a nonconductive state according to an instruction;
- and
- a capacitor-resistor (C-R) circuit configured to charge electric charge of an output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground when the switch element is nonconductive.
3 more elements
A recording apparatus comprising:
- a power supply device including,
- a DC-DC converter configured to regulate an output voltage based on an externally input instruction;
- and
- a discharge circuit connected to an output capacitor of the DC-DC converter, wherein the discharge circuit includes,
- a switch element configured to switch between a conductive state and a nonconductive state according to an instruction;
- and
- a capacitor-resistor (C-R) circuit configured to charge electric charge accumulated in the output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground while the switch element is nonconductive;
- and
- a control unit configured to control an operation of the recording apparatus, wherein the control unit outputs an instruction for changing the output voltage to the DC-DC converter and the discharge circuit.
6 more elements
A recording apparatus comprising:
- a power supply device including,
- a DC-DC converter configured to regulate an output voltage based on an externally input instruction;
- and
- a discharge circuit connected to an output capacitor of the DC-DC converter,
- wherein the discharge circuit includes,
- a switch element configured to switch between a conductive state and a nonconductive state according to an instruction;
- and
- a capacitor-resistor (C-R) circuit configured to charge electric charge accumulated in the output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground while the switch element is nonconductive;
- and
- a control unit configured to control an operation of the recording apparatus, wherein the control unit outputs an instruction to the switch element such that a nonconduction period of the switch element becomes longer than a conduction period of the switch element.
7 more elements
A recording apparatus comprising:
- a power supply device including,
- a DC-DC converter configured to regulate an output voltage based on an externally input instruction;
- and
- a discharge circuit connected to an output line of the DC-DC converter, wherein the discharge circuit includes,
- a switch element configured to switch between a conductive state and a nonconductive state according to an instruction;
- and
- a capacitor-resistor (C-R) circuit configured to charge electric charge of an output capacitor of the DC-DC converter when the switch element is conductive and to discharge the electric charge to ground when the switch element is nonconductive;
- and
- a control unit configured to control an operation of the recording apparatus, wherein the control unit outputs an instruction for changing the output voltage to the DC-DC converter and the discharge circuit.
6 more elements
Dependencies are inferred from the claim text.