| 摘要 |
PROBLEM TO BE SOLVED: To provide the power amplifier device of a switching system that can simplify a filter for noise elimination. SOLUTION: The power amplifier device is provided with a couple of power amplifiers 33A, 33B for adopting a switching system for power amplification. A coil 34A (34B) of a transformer 34 is connected in series between each output terminal of the power amplifier 33A (33B) and one terminal (other terminal) of a speaker. A capacitor 35 is connected in parallel between outputs of the coils 34A, 34B. The coils 34A, 34B respectively have a mutual inductance and a leakage inductance of a prescribed magnitude.
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