| 摘要 |
PURPOSE:To generate the best stereo reproducing sound by displaying the output level of a phase detection circuit to clarify the tuning operation. CONSTITUTION:The output of a phase detection circuit 5 is smoothed by an integration circuit 14 and after result is amplified by a DC amplifier 7, whether or not the level is high is compared by an indicator 9, resulting whether the circuit is tuned, or the tuning is shifted to the lower frequency or the tuning is shifted to the higher frequency is displayed. Thus, the tuning operation conducted conventionally by the audible sense of the listener is tuned clearly based on the display means and the best stereo reproducing sound is generated. |
