| 摘要 |
<p>PURPOSE: To reduce the power consumption when a power source switch is turned off and to prolong the holding period of internal information by making power supply voltage supplied for holding internal information in a state that the power source switch is turned off, lower than the power supply voltage in a state that the power source is turned on, in a portable computer having a suspend/resume function. CONSTITUTION: A power source circuit 21 supplies 5V operation power to a 5V circuit (B) 13 holding internal information at the time of state of a power source switch 10 when the power source switch 10 is turned on, and supplies 3.3V operating power source which is lower than that when the power source switch 10 is turned off, by making a battery 22 as a power source.</p> |
