| 摘要 |
<p>PURPOSE:To obtain an automatic program searching circuit (APS circuit) in simple constitution at low cost by inputting an output signal of a Dolby NR circuit to the automatic program searching circuit. CONSTITUTION:The recorder is provided with reproducing heads, equalizer amplifiers 1 and 2 for amplifying output signals of the reproducing heads, the Dolby NR circuit 3 to be inputted by the output signals of the equalizer amplifiers 1 and 2 and the automatic program searching circuit 5, where the output signal of the Dolby NR circuit 3 is inputted to the automatic program searching circuit 5. Then, when the automatic program searching circuit 5 is under operation, an NR function of the Dolby NR circuit is stopped. By this method, a gain of the Dolby NR circuit 3 is secured without changing an intermusic detecting level, and the APS circuit is stably operated in simple constitution.</p> |
