| 摘要 |
The circuit for supplying a VCR unit and a camera unit with operation power and simultaneously charging an external battery, includes an AC/DC converter (11), a battery pack loading detector (13), a power jack (14), DC/DC converters (17,18) for a VCR unit (15) and a camera unit (16), a charging switch (19), a main switch (20) for the units (15,16), a control unit (21) for controlling the power output of the battery pack (12) and the operations of the DC/DC converters (17,17), a switch (SW11) for charging an output power from the converter (11) to the battery pack (12), and a power output switch (SW12) for outputting the charged power of the battery pack (12).
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