| 摘要 |
PURPOSE:To prevent a switching noise by adding reproduced sound signals by an adding means to obtain a continuously connected output reproduced sound signal waveform when phases of sampling clock signals are constant in the period when carrier levels of these sound signals are regular levels. CONSTITUTION:Sampling circuits 27 and 29 sample the first left channel reproduced sound signals supplied from clamping circuits 12 and 22 in accordance with sampling clock signals (g) and (h) to obtain sample signals (i) and (j). These sampled signals (i) and (j) are added by an adder 43, and sampling clock frequencies are eliminated from the output of the adder 43 by a low-pass filter 44 to obtain a left channel reproduced sound signal waveform where the first and the second reproduced sound signals are connected continuously at a time t2, and this waveform is outputted to an output terminal 45. Since phases of sampling clock signals (g) and (h) are constant after and before the time t2 and are switched, sampled signals (i) and (j) are added to obtain a reproduced sound signal having no phase disturbance (switching noise).
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