Discharge circuit, information processing apparatus, discharge method, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorMasahiro Takizawa
Life of this patent
Estimating the term…
Abstract
A discharge circuit for a decoupling capacitor to stabilize a voltage supplied from a first power supply unit to a first load includes a first capacitor, a first switch, and a discharge control circuit. The first capacitor is charged by power supplied from a second power supply unit that supplies power to a second load that is different from the first load. The first switch is arranged between the decoupling capacitor and ground. The discharge control circuit discharges, in a case where power supplied from the second power supply unit to the second load is cut off, charges of the decoupling capacitor to the ground by driving the first switch using charges stored in the first capacitor.
Claims13
A discharge apparatus for discharging power charged in a decoupling capacitor of a load, the discharge apparatus comprising:
- a power supply unit;
- a first switch which is arranged between the decoupling capacitor and ground;
- a power control circuit which outputs a control signal;
- a discharge control circuit which outputs a discharge signal for controlling the first switch in accordance with input of the control signal, wherein the power charged in a decoupling capacitor is discharged to the ground by controlling the first switch;
- and
- a first capacitor which is charged with power supplied from the power supply unit and supplies the charged power to the discharge control circuit,
- wherein the discharge control circuit, to which the charged power in the first capacitor is supplied, outputs the discharge signal in accordance with the input of the control signal.
An information processing apparatus comprising:
- a first power supply unit;
- a first load to which power is supplied from the first power supply unit;
- a second power supply unit;
- a second load to which power is supplied from the second power supply unit;
- a decoupling capacitor of the first load;
- a power control circuit which outputs a control signal;
- and
- a discharge circuit which discharges power charged in the decoupling capacitor to ground, wherein the discharge circuit includes:
- a first switch which is arranged between the decoupling capacitor and the ground,
- a discharge control circuit which outputs a discharge signal for controlling the first switch in accordance with input of the control signal, wherein the power charged in the decoupling capacitor is discharged to the ground by controlling the first switch, and
- a first capacitor which is charged with power supplied from the second power supply unit and supplies the charged power to the discharge control circuit,
- wherein the discharge control circuit, to which the charged power in the first capacitor is supplied, outputs the discharge signal in accordance with the input of the control signal.
A method for a discharge circuit, wherein the discharge circuit is for a decoupling capacitor to stabilize a voltage supplied from a first power supply unit to a first load and includes a first switch arranged between the decoupling capacitor and ground, the method comprising:
- charging a first capacitor with power supplied from a second power supply unit that supplies power to a second load that is different from the first load;
- supplying the charged power in the first capacitor to a discharge control circuit;
- inputting a control signal to the discharge control circuit;
- outputting, from the discharge control circuit to which the charged power in the first capacitor is supplied, a discharge signal;
- and
- discharging a charged power in the decoupling capacitor to the ground in accordance with input of the discharge signal.
Dependencies are inferred from the claim text.