| 摘要 |
PROBLEM TO BE SOLVED: To provide a voice output device which can reduce noise generated due to a GND loop. SOLUTION: The voice output device includes input units 11, 12 provided to input a voice signal of one channel, a speaker, a voice signal processing circuit for generating the voice signal inputted to the speaker, a transformer 31 having a primary side winding coil 16 interposed between the input units 11 and 12 and secondary winding coils 32, 33 for outputting voice signals of reverse phases to each other, and a differential amplifier 38 for inputting the voice signal from the winding 32 to a non-inverting input unit and inputting the voice signal from the winding 33 to an inverting input unit. COPYRIGHT: (C)2004,JPO
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