Power supply control circuit and drug solution administration apparatus including the power supply control circuit
AssigneeTerumo Kabushiki Kaisha
InventorYusuke YAKUSHIJI
Life of this patent
Estimating the term…
Abstract
A power supply control circuit capable of achieving power saving. The power supply control circuit includes: a microcomputer that controls an operation of a control target; a power supply unit that supplies power to the microcomputer; a power switch that connects the power supply unit and the microcomputer; a bypass circuit that includes a MOSFET switch and is capable of bypassing the power switch to maintain connection between the power supply unit and the microcomputer; and a cut-off circuit that includes a MOSFET switch and is disposed between the bypass circuit and the microcomputer.
Claims20
A power supply control circuit comprising:
- a controller configured to control an operation of a control target;
- a power supply unit configured to supply power to the controller;
- a power switch configured to connect the power supply unit and the controller;
- a bypass circuit that includes a first semiconductor switch and is capable of bypassing the power switch to maintain connection between the power supply unit and the controller;
- a cut-off circuit that includes a second semiconductor switch and is disposed between the bypass circuit and the controller;
- wherein when the second semiconductor switch is in an off state, a leakage current generated between the controller and the power supply unit via the bypass circuit is cut off by the cut-off circuit;
- and
- when the second semiconductor switch is turned on by a switch-on signal output from the controller, the first semiconductor switch is turned on and the bypass circuit bypasses the power switch to maintain connection between the power supply unit and the controller.
A drug solution administration system comprising:
- a drug solution administration apparatus, the drug solution administration apparatus comprising:
- a drug solution container configured to hold a drug solution;
- a housing that holds the drug solution container;
- a pusher configured to push the drug solution contained in the drug solution container;
- a drive mechanism configured to move forward the pusher toward a distal end of the drug solution container;
- and
- a detection part configured to sense a to-be-detected part of the pusher to detect completion of delivery of the drug solution on the basis of a sensing result;
- and
- a controller configured to control operations of the drive mechanism to be controlled, the controller comprising:
- a power supply unit configured to supply power to the controller;
- a power switch configured to connect the power supply unit and the controller;
- a bypass circuit that includes a first semiconductor switch and is capable of bypassing the power switch to maintain connection between the power supply unit and the controller;
- a cut-off circuit that includes a second semiconductor switch and is disposed between the bypass circuit and the controller;
- wherein when the second semiconductor switch is in an off state, a leakage current generated between the controller and the power supply unit via the bypass circuit is cut off by the cut-off circuit;
- and
- when the second semiconductor switch is turned on by a switch-on signal output from the controller, the first semiconductor switch is turned on and the bypass circuit bypasses the power switch to maintain connection between the power supply unit and the controller.
A method of controlling power supply to a drug solution administration apparatus with a controller configured to control an operation of a control target, the method comprising:
- supplying power to the controller from a power supply unit;
- connecting the power supply unit and the controller with a power switch;
- bypassing the power switch to maintain connection between the power supply unit and the controller with a bypass circuit that includes a first semiconductor switch;
- disposing a cut-off circuit that includes a second semiconductor switch between the bypass circuit and the controller;
- wherein when the second semiconductor switch is in an off state, generating a leakage current between the controller and the power supply unit via the bypass circuit is cut off by the cut-off circuit;
- and
- when the second semiconductor switch is turned on by a switch-on signal output from the controller, turning on the first semiconductor switch and bypassing the power switch with the bypass circuit to maintain connection between the power supply unit and the controller.
Dependencies are inferred from the claim text.