| 摘要 |
PURPOSE:To make variations of voltage small by installing a second on/off device which determines whether a d.c. power supply should be output through a diode or not when the d.c. power supply supplied from an input terminal is output to a first on/off device. CONSTITUTION:Each of power on/off devices 11, 12 is constituted of a switch S1a or S2a to turn on and off the output to an output terminal 100 and a bypass switch S1b or S2b to determine whether d.c. power supplied from an input terminal 101 or 102 should be output through a diode D1 or D2 when the d.c. power is output to the switch S1a or S2a. Therefore, in the normal use condition, the voltage of a selected power device can be output as it is. At the time of switching a power supply, a variation of the output voltage can be held in a short time since it is a drop of forward voltage of the diodes D1, D2. Consequently, variations of voltage can be made small. |
