| 摘要 |
PROBLEM TO BE SOLVED: To stabilize a power supply state to a D-class power amplifier. SOLUTION: The power supply state is stabilized, by falling a power supply from a power source 30 through switching of a first power MOSFET 34A of one power amplifier 34 and a first power MOSFET 54A of a power amplifier 54 from on-states to off-states, when the power supply of the power source 30 rises by switching a first power MOSFET 24A of a power amplifier 24 and a first power MOSFET 44A of a power amplifier 44 from off-states to on-states.
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