| 摘要 |
PURPOSE:To reduce the voltage fluctuation of a power source, and to exactly reproduce a signal wave, or a dynamic range, by driving a power amplifier on one side out of two power amplifiers with a negative phase against the power amplifier on the other side. CONSTITUTION:At the time of operating the first power amplifier 1 on one side in a positive half cycle, and permitting a load current IL to flow from a positive power source circuit 3, the second power amplifier 2 on the other side is operated in a negative half cycle, and a load current, the inverse of IR flows in from a negative power circuit 4. And in the period of the following half cycle, a reverse operation to the previous period is performed, and the currents IL and IR, and the currents, the inverse of IL, and the inverse of IR, are permitted to flow in the positive and the negative power source circuits by every half cycle alternately, and as a resulted, only a load current of one channel sequence is always permitted to flow, and it is possible to suppress the voltage fluctuation due to impedance r0 in the power source to a slight degree, same as that in one channel, to perform the transmission of an input waveform with high fidelity, and to prevent deterioration in the dynamic range.
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