| 摘要 |
PROBLEM TO BE SOLVED: To control the power outputted from an AC adapter with a signal which is supplied from a connected set and to make the loss extremely small. SOLUTION: An AC switch circuit 1 and the primary side of a transformer 2 are inserted between terminals T1 and T2 in series. One secondary side of the transformer 2 is connected to the anode of a diode 3, and a capacitor 4 is inserted between the cathode of the diode 3 and the other secondary side of the transformer 2. A regulator part 5 which outputs constant voltage/constant current is inserted between the cathode of the diode 2 and a terminal T3. A circuit part 6 which controls the AC adapter is inserted between the terminals T3 and T4. The circuit part 6 sets the AC switch circuit to an on-state, in accordance with an AC operation signal transmitted from a set 7. The output power is supplied to the set 7 via the terminals T4, T5, T4 and T6. |
