Title:
POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP3968491
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To avoid effectively unnecessary power consumption caused by erroneous closing of a power supply switch in a battery-driven electronic equipment.
SOLUTION: When a switch 5, which is a power protective switch, is switched to be connected to a terminal (a) side and grounded, a control circuit 3 detects the operation of a power supply switch 2 and controls the power supply of a system power supply circuit 1. When the switch 5 is switched to a terminal (b) side, if a system power supply is in an on-state, a switch 4 is turned on and the control circuit 3 detects the operation of the power supply switch 2 and controls the power supply of the system power supply circuit 1. However, if the system power supply is in an off-state, since the switch 4 is turned off and the operation of the power supply 2 cannot be received by the control circuit 3, the power supply being turned on by the erroneous operation of the power supply switch 2 is prevented.
Inventors:
Hidekazu Iemon
Application Number:
JP29578198A
Publication Date:
August 29, 2007
Filing Date:
October 16, 1998
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G06F1/26; H02J7/00; (IPC1-7): H02J7/00; //G06F1/26
Domestic Patent References:
| JP10105293A | ||||
| JP5333773A | ||||
| JP62213522A |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga
Previous Patent: COMPONENT CONVEYOR IN AND OUT OF CHAMBER AND COMPONENT TESTER
Next Patent: HEADPHONE DEVICE
Next Patent: HEADPHONE DEVICE