| 摘要 |
A power amplifier apparatus includes a pair of power amplifiers for performing switching-type power amplification, a transformer, and a capacitor. The transformer is formed of a pair of coils which are connected in series between the corresponding output terminals of the pair of power amplifiers and the corresponding ends of a speaker. The capacitor is connected in parallel with the output terminals of the pair of coils. With this configuration, a mutual inductance and a leakage inductance are generated in the coils. As a result, 180°-out-of-phase and in-phase noise components contained in an output of the power amplifier apparatus can be eliminated.
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