| 摘要 |
PURPOSE:To minimize the level of an unnecessary higher order component included in an output signal and to improve the distortion by multiplying one side signal with other signal through a low pass filter and the serial circuit of a soft limitter to smoothen the waveform. CONSTITUTION:Between low pass filters 111 and 112 and multipliers 51 and 52, soft limiters 131 and 132 are respectively arranged. The output signal of the low pass filters 111 and 112, after the waveform is made smooth, namely, a higher order harmonic level is attenuated respectively through the soft limiters 131 and 132 and is supplied to the multipliers 51 and 52. Thus, the unnecessary higher order component level included in the output signal of an adder 12 is reduced and the distortion is improved.
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